[1] [1] Li J, Qiao J, Lian K. Hydroxide ion conducting polymer electrolytes and their applications in solid supercapacitors: a review. Energy Storage Mater. 2020;24:6.

[2] [2] Chen J, Lee PS. Electrochemical supercapacitors: from mechanism understanding to multifunctional applications. Adv Energy Mater. 2021;11:2003311.10.1002/aenm.202003311

[3] [3] Nagaraju G, Sekhar SC, Ramulu B, Yu JS. An integrated approach toward renewable energy storage using rechargeable Ag@ Ni0.67Co0.33S-based hybrid supercapacitors. Small. 2019;15:1805418.10.1002/smll.201805418

[4] [4] Sharma K, Arora A, Tripathi SK. Review of supercapacitors: materials and devices. J Energy Storage. 2019;2:801.

[5] [5] Patra A, Namsheer K, Jose JR, Sahoo S, Chakraborty B, Rout CS. Understanding the charge storage mechanism of supercapacitors: in situ/operando spectroscopic approaches and theoretical investigations. J Mater Chem A. 2021;9:25852.10.1039/D1TA07401F

[6] [6] Liu S, Wei L, Wang H. Review on reliability of supercapacitors in energy storage applications. Appl Energy. 2020;278:115436.10.1016/j.apenergy.2020.115436

[7] [7] Lang X, Hirata A, Fujita T, Chen M. Nanoporous metal/oxide hybrid electrodes for electrochemical supercapacitors. Nat Nanotechnol. 2011;6:232.10.1038/nnano.2011.13

[8] [8] Balducci A, Dugas R, Taberna P-L, Simon P, Plee D, Mastragostino M, Passerini S. High temperature carbon–carbon supercapacitor using ionic liquid as electrolyte. J Power Sources. 2007;165:922.10.1016/j.jpowsour.2006.12.048

[9] [9] Largeot C, Portet C, Chmiola J, Taberna P-L, Gogotsi Y, Simon P. Relation between the ion size and pore size for an electric double-layer capacitor. J Am Chem Soc. 2008;130:2730.10.1021/ja7106178

[10] [10] Manjakkal L, Franco FF, Pullanchiyodan A, González-Jiménez M, Dahiya R. Natural jute fibre-based supercapacitors and sensors for eco-friendly energy autonomous systems. Adv Sustain Syst. 2021;5:2000286.10.1002/adsu.202000286

[11] [11] Palanisamy R, Karuppiah D, Rengapillai S, Abdollahifar M, Ramasamy G, Wang F-M, Liu W-R, Ponnuchamy K, Shim J, Marimuthu S. A reign of bio-mass derived carbon with the synergy of energy storage and biomedical applications. J Energy Storage. 2022;51:104422.10.1016/j.est.2022.104422

[12] [12] Tadesse MG, Lübben JF. Review on hydrogel-based flexible supercapacitors for wearable applications. Gels. 2023;9:106.10.3390/gels9020106

[13] [13] Wu G, Wu X, Zhu X, Xu J, Bao N. Two-dimensional hybrid nanosheet-based supercapacitors: from building block architecture, fiber assembly, and fabric construction to wearable applications. ACS Nano. 2022;16:10130.10.1021/acsnano.2c02841

[14] [14] Hu K, Zhao Z, Wang Y, Yu L, Liu K, Wu H, Huang L, Chen L, Ni Y. A tough organohydrogel-based multiresponsive sensor for a triboelectric nanogenerator and supercapacitor toward wearable intelligent devices. J Mater Chem A. 2022;10:12092.10.1039/D2TA01503J

[15] [15] Choudhury BJ, Moholkar VS. Ultrasound-assisted facile one-pot synthesis of ternary MWCNT/MnO2/rGO nanocomposite for high performance supercapacitors with commercial-level mass loadings. Ultrason Sonochem. 2022;82:105896.10.1016/j.ultsonch.2021.105896

[16] [16] Zhou Z, Li P, Man Z, Zhu X, Ye S, Lu W, Wu G, Chen W. Multiscale dot-wire-sheet heterostructured nitrogen-doped carbon dots-Ti3C2Tx/silk nanofibers for high-performance fiber-shaped supercapacitors. Angew Chem Int Ed. 2023;62:e202301618.10.1002/anie.202301618

[17] [17] Lee S, An G-H. Interface engineering of carbon fiber-based electrode for wearable energy storage devices. Adv Fiber Mater. 2023;1:1749.10.1007/s42765-023-00303-6

[18] [18] Guan T, Li Z, Qiu D, Wu G, Wu J, Zhu L, Zhu M, Bao N. Recent progress of graphene fiber/fabric supercapacitors: from building block architecture, fiber assembly, and fabric construction to wearable applications. Adv Fiber Mater. 2023;1:896.10.1007/s42765-023-00262-y

[19] [19] Augustyn V, Simon P, Dunn B. Pseudocapacitive oxide materials for high-rate electrochemical energy storage. Energy Environ Sci. 2014;7:1597.10.1039/c3ee44164d

[20] [20] Sahoo S, Kumar R, Joanni E, Singh RK, Shim J-J. Advances in pseudocapacitive and battery-like electrode materials for high performance supercapacitors. J Mater Chem A. 2022;10:13190.10.1039/D2TA02357A

[21] [21] Tang Y, Guo W, Zou R. Nickel-based bimetallic battery-type materials for asymmetric supercapacitors. Coord Chem Rev. 2022;451:214242.10.1016/j.ccr.2021.214242

[22] [22] Zheng S, Li X, Yan B, Hu Q, Xu Y, Xiao X, Xue H, Pang H. Transition-metal (Fe Co, Ni) based metal-organic frameworks for electrochemical energy storage. Adv Energy Mater. 2017;7:1602733.10.1002/aenm.201602733

[23] [23] Yu F, Huang T, Zhang P, Tao Y, Cui F-Z, Xie Q, Yao S, Wang F. Design and synthesis of electrode materials with both battery-type and capacitive charge storage. Energy Storage Mater. 2019;22:235.

[24] [24] Ramulu B, Sekhar SC, Arbaz SJ, Nagaraju M, Yu JS. Nickel–cobalt phosphate nanoparticle-layer shielded in-situ grown copper–nickel molybdate nanosheets for electrochemical energy storage. Energy Storage Mater. 2022;44:379.

[25] [25] Zhang J, Liu F, Cheng J, Zhang X. Binary nickel–cobalt oxides electrode materials for high-performance supercapacitors: influence of its composition and porous nature. ACS Appl Mater Interfaces. 2015;7:17630.10.1021/acsami.5b04463

[26] [26] Yang L, Qian L, Tian X, Li J, Dai J, Guo Y, Xiao D. Hierarchically porous nickel oxide nanosheets grown on nickel foam prepared by one-step in situ anodization for high-performance supercapacitors. Chem Asian J. 2014;9:1579.10.1002/asia.201402175

[27] [27] Feng L, Zhu Y, Ding H, Ni C. Recent progress in nickel based materials for high performance pseudocapacitor electrodes. J Power Sources. 2014;267:430.10.1016/j.jpowsour.2014.05.092

[28] [28] Wang D, Tang K, Xiao J, Li X, Long M, Chen J, Gao H, Chen W, Liu C, Liu H. Advances of electrospun Mo-based nanocomposite fibers as anode materials for supercapacitors. Sustain Mater Technol. 2021;29:e00302.

[29] [29] Hu X, Zhang W, Liu X, Mei Y, Huang Y. Nanostructured Mo-based electrode materials for electrochemical energy storage. Chem Soc Rev. 2015;44:2376.10.1039/C4CS00350K

[30] [30] Zheng W, Halim J, Persson PO, Rosen J, Barsoum MW. Effect of vacancies on the electrochemical behavior of Mo-based MXenes in aqueous supercapacitors. J Power Sources. 2022;525:231064.10.1016/j.jpowsour.2022.231064

[31] [31] Cevik E, Gunday ST, Iqbal A, Akhtar S, Bozkurt A. Synthesis of hierarchical multilayer N-doped Mo2C@MoO3 nanostructure for high-performance supercapacitor application. J Energy Storage. 2022;46:103824.10.1016/j.est.2021.103824

[32] [32] Zong Q, Liu C, Yang H, Zhang Q, Cao G. Tailoring nanostructured transition metal phosphides for high-performance hybrid supercapacitors. Nano Today. 2021;38:101201.10.1016/j.nantod.2021.101201

[33] [33] Niu Y, Su H, Li X, Li J, Qi Y. Synthesis of porous α-MoO3 microspheres as electrode materials for supercapacitors. J Alloys Compd. 2022;898:162863.10.1016/j.jallcom.2021.162863

[34] [34] Singu BS, Chitumalla RK, Mandal D, Kim Y, Kim GH, Chung HT, Jang J, Kim H. Development of metal-organic framework-derived NiMo-MoO3−x porous nanorod for efficient electrocatalytic hydrogen evolution reactions. Appl Catal B Environ. 2023;328:122421.10.1016/j.apcatb.2023.122421

[35] [35] Ghosh D, Giri S, Das CK. Synthesis, characterization and electrochemical performance of graphene decorated with 1D NiMoO4·nH2O nanorods. Nanoscale. 2013;5:10428.10.1039/c3nr02444j

[36] [36] Chang J, Jin M, Yao F, Kim TH, Le VT, Yue H, Gunes F, Li B, Ghosh A, Xie S. Asymmetric supercapacitors based on graphene/MnO2 nanospheres and graphene/MoO3 nanosheets with high energy density. Adv Funct Mater. 2013;23:5074.10.1002/adfm201301851

[37] [37] Tang W, Liu L, Tian S, Li L, Yue Y, Wu Y, Zhu K. Aqueous supercapacitors of high energy density based on MoO3 nanoplates as anode material. Chem Comm. 2011;47:10058.10.1039/c1cc13474d

[38] [38] Cai D, Wang D, Liu B, Wang L, Liu Y, Li H, Wang Y, Li Q, Wang T. Three-dimensional Co3O4@NiMoO4 core/shell nanowire arrays on Ni foam for electrochemical energy storage. ACS Appl Mater Interfaces. 2014;6:5050.10.1021/am500060m

[39] [39] Yang R, Guo X, Song K, Bai X, Jia L, Chen X, Wang X, Wang J. Influence of pH on the crystal structure of NiMoO4 nanomaterials and their supercapacitor performances. Ceram Int. 2021;47:11349.10.1016/j.ceramint.2020.12.261

[40] [40] Yousefipour K, Sarraf-Mamoory R, Mollayousefi S. Synthesis of manganese molybdate/MWCNT nanostructure composite with a simple approach for supercapacitor applications. RSC Adv. 2022;12:27868.10.1039/D2RA04691A

[41] [41] Cheng D, Yang Y, Luo Y, Fang C, Xiong J. Growth of ultrathin mesoporous Ni-Mo oxide nanosheet arrays on Ni foam for high-performance supercapacitor electrodes. Electrochim Acta. 2015;176:1343.10.1016/j.electacta.2015.07.149

[42] [42] Ramulu B, Nagaraju G, Chandra Sekhar S, Hussain SK, Narsimulu D, Yu JS. Synergistic effects of cobalt molybdate@phosphate core–shell architectures with ultrahigh capacity for rechargeable hybrid supercapacitors. ACS Appl Mater Interfaces. 2019;11:41245.10.1021/acsami.9b11707

[43] [43] Xu Z, Sun S, Han Y, Wei Z, Cheng Y, Yin S, Cui W. High-energy-density asymmetric supercapacitor based on a durable and stable manganese molybdate nanostructure electrode for energy storage systems. ACS Appl Energy Mater. 2020;3:5393.10.1021/acsaem.0c00393

[44] [44] Gao H, Wu F, Wang X, Hao C, Ge C. Preparation of NiMoO4-PANI core-shell nanocomposite for the high-performance all-solid-state asymmetric supercapacitor. Int J Hydrog. 2018;43:18349.10.1016/j.ijhydene.2018.08.018

[45] [45] Nti F, Anang DA, Han JI. Facilely synthesized NiMoO4/CoMoO4 nanorods as electrode material for high performance supercapacitor. J Alloys Compd. 2018;742:342.10.1016/j.jallcom.2018.01.289

[46] [46] Choudhury BJ, Muigai HH, Kalita P, Moholkar VS. Biomass blend derived porous carbon for aqueous supercapacitors with commercial-level mass loadings and enhanced energy density in redox-active electrolyte. Appl Surf Sci. 2022;601:154202.10.1016/j.apsusc.2022.154202

[47] [47] Yang X, Lv T, Qiu J. High mass-loading biomass-based porous carbon electrodes for supercapacitors: review and perspectives. Small. 2023;19:2300336.10.1002/smll.202300336

[48] [48] Zhang D, Guo X, Tong X, Chen Y, Duan M, Shi J, Jiang C, Hu L, Kong Q, Zhang J. High-performance battery-type supercapacitor based on porous biocarbon and biocarbon supported Ni–Co layered double hydroxide. J Alloys Compd. 2020;837:155529.10.1016/j.jallcom.2020.155529

[49] [49] Liu M, Zhang K, Si M, Wang H, Chai L, Shi Y. Three-dimensional carbon nanosheets derived from micro-morphologically regulated biomass for ultrahigh-performance supercapacitors. Carbon. 2019;153:707.10.1016/j.carbon.2019.07.060

[50] [50] Hu C, Gong J, Wang J, Zhou T, Xie M, Wang S, Dai Y. Composites of NiMoO4@Ni-Co LDH@NiCo2O4 on Ni foam with a rational microscopic morphology for high-performance asymmetric supercapacitors. J Alloys Compd. 2022;902:163749.10.1016/j.jallcom.2022.163749

[51] [51] Lv H, Pan Q, Song Y, Liu X-X, Liu T. A review on nano-/microstructured materials constructed by electrochemical technologies for supercapacitors. Nanomicro Lett. 2020;12:1.

[52] [52] Gao Z, Song N, Li X. Microstructural design of hybrid CoO@NiO and graphene nano-architectures for flexible high performance supercapacitors. J Mater Chem A. 2015;3:14833.10.1039/C5TA03057A

[53] [53] Ahmed R, Nabi G. Enhanced electrochemical performance of Cr-doped NiO nanorods for supercapacitor application. J Energy Storage. 2021;33:102115.10.1016/j.est.2020.102115

[54] [54] Waghmode R, Jadhav H, Kanade K, Torane A. Morphology-controlled synthesis of NiCo2O4 nanoflowers on stainless steel substrates as high-performance supercapacitors. Mater Sci Energy Technol. 2019;2:556.

[55] [55] Sluder CS, Storey JM, Lewis SA, Lewis LA. Low temperature urea decomposition and SCR performance. SAE Trans. 2005;114:669.

[56] [56] Yim SD, Kim SJ, Baik JH, Nam IS, Mok YS, Lee J-H, Cho BK, Oh SH. Decomposition of urea into NH3 for the SCR process. Ind Eng Chem Res. 2004;43:4856.10.1021/ie034052j

[57] [57] Xue Y, Yu T, Chen J, Wan X, Cai X, Guo X, Zhang F, Xiong W, Liu Y, Kong Q. Fabrication of GeO2 microspheres/hierarchical porous N-doped carbon with superior cyclic stability for Li-ion batteries. J Solid State Chem. 2020;286:121303.10.1016/j.jssc.2020.121303

[58] [58] Sun J, Niu J, Liu M, Ji J, Dou M, Wang F. Biomass-derived nitrogen-doped porous carbons with tailored hierarchical porosity and high specific surface area for high energy and power density supercapacitors. Appl Surf Sci. 2018;427:807.10.1016/j.apsusc.2017.07.220

[59] [59] Arbaz SJ, Sekhar SC, Ramulu B, Yu JS. Nitrogen-and carbon-rich Ni2O3 nanolayer shielded Ni3C elongated square bipyramidal-like nanostructures for hybrid supercapacitors. Int J Energy Res. 2022;46:4895.10.1002/er.7483

[60] [60] Ramulu B, Sekhar SC, Arbaz SJ, Yu JS. Nano-Ag laminated ternary layered double hydroxides for hybrid supercapacitors. J Chem Eng. 2021;420:130376.10.1016/j.cej.2021.130376

[61] [61] Shanthappa R, Narsimulu D, Kakarla AK, Yu JS. Nitrogen-doped reduced graphene oxide incorporated porous rod-like cobalt molybdate as an anode for high-capacity long-life lithium-ion batteries. Int J Energy Res. 2021;45:19509.10.1002/er.7052

[62] [62] Ramesh S, Karuppasamy K, Vikraman D, Santhoshkumar P, Bathula C, Palem RR, Kathalingam A, Kim H-S, Kim J-H, Kim HS. Sheet-like morphology CuCo2O4 bimetallic nanoparticles adorned on graphene oxide composites for symmetrical energy storage applications. J Alloys Compd. 2022;892:162182.10.1016/j.jallcom.2021.162182

[63] [63] Prakash NG, Dhananjaya M, Narayana AL, Hussain O. One-dimensional MoO3/Pd nanocomposite electrodes for high performance supercapacitors. Mater Res Express. 2019;6:085543.10.1088/2053-1591/ab273e

[64] [64] Yousefipour K, Sarraf-Mamoory R, Yourdkhani A. Supercapacitive properties of nickel molybdate/rGO hybrids prepared by the hydrothermal method. Surf Interfaces. 2022;29:101638.10.1016/j.surfin.2021.101638

[65] [65] Bhagwan J, Hussain SK, Yu JS. Facile hydrothermal synthesis and electrochemical properties of CaMoO4 nanoparticles for aqueous asymmetric supercapacitors. ACS Sustain Chem Eng. 2019;7:12340.

[66] [66] Mule AR, Ramulu B, Yu JS. Prussian-blue analogue-derived hollow structured Co3S4/CuS2/NiS2 nanocubes as an advanced battery-type electrode material for high-performance hybrid supercapacitors. Small. 2022;18:2105185.10.1002/smll.202105185

[67] [67] Nagaraju M, Ramulu B, Arbaz SJ, Yu JS. Direct construction of cobalt selenate-cobalt phosphide composite with exalted energy storage for hybrid supercapacitor cells. J Alloys Compd. 2023;969:172246.10.1016/j.jallcom.2023.172246

[68] [68] Gaire M, Subedi B, Adireddy S, Chrisey D. Ultra-long cycle life and binder-free manganese-cobalt oxide supercapacitor electrodes through photonic nanostructuring. RSC Adv. 2020;10:40234.10.1039/D0RA08510C

[69] [69] Nagaraju M, Sekhar SC, Ramulu B, Arbaz SJ, Yu JS. In situ deposited cobalt-magnesium selenates as an advanced electrode for electrochemical energy storage. J Magnes Alloy. 2022;10:3565.10.1016/j.jma.2021.12.012

[70] [70] Yang C, Ma Y, Feng X, Ning H, Zhang S, Li J, An C. Long-cycling and high-rate electrochemical performance of expanded graphite cathode materials with a two-stage aluminum storage mechanism. Sustain Energy Fuels. 2021;5:5833.10.1039/D1SE01412A

[71] [71] Zhai Z, Zhang L, Du T, Ren B, Xu Y, Wang S, Miao J, Liu Z. A review of carbon materials for supercapacitors. Mater Des. 2022;221:111017.10.1016/j.matdes.2022.111017

[72] [72] Jiang G, Senthil RA, Sun Y, Kumar TR, Pan J. Recent progress on porous carbon and its derivatives from plants as advanced electrode materials for supercapacitors. J Power Sources. 2022;520:230886.10.1016/j.jpowsour.2021.230886

[73] [73] Chang Q, Li L, Sai L, Shi W, Huang L. Water-soluble hybrid graphene ink for gravure-printed planar supercapacitors. Adv Electron Mater. 2018;4:1800059.10.1002/aelm.201800059

[74] [74] Liu L, Feng Y, Liang J, Li S, Tian B, Yao W, Wu W. Structure-designed fabrication of all-printed flexible in-plane solid-state supercapacitors for wearable electronics. J Power Sources. 2019;425:195.10.1016/j.jpowsour.2019.03.118

[75] [75] Navaneeth P, Kumar A, Nair BG, Satheesh Babu TG, Suneesh PV. Studies on fabrication of high-performance flexible printed supercapacitor using cobalt hydroxide nanowires. Electrochim Acta. 2022;430:141096.10.1016/j.electacta.2022.141096

[76] [76] Callaghan MJ, Oldham JA. Electric muscle stimulation of the quadriceps in the treatment of patellofemoral pain. Arch Phys Med Rehabil. 2004;85:956.10.1016/j.apmr.2003.07.021

[77] [77] Michiue K, Nishikawa Y. Electrical muscle stimulation intervention in the acute phase of neuromyelitis optica: two case reports. SAGE Open Med Case Rep. 2020;8:1.

[78] [78] Matsubara S, Wakisaka S, Aoyama K, Seaborn K, Hiyama A, Inami M. Perceptual simultaneity and its modulation during EMG-triggered motion induction with electrical muscle stimulation. PLoS ONE. 2020;15:e0236497.10.1371/journal.pone.0236497

[79] [79] Rupp R, Biering-Sørensen F, Burns SP, Graves DE, Guest J, Jones L, Read MS, Rodriguez GM, Schuld C, Tansey-Md KE. International standards for neurological classification of spinal cord injury: revised 2019. Spinal Cord Inj Rehabil. 2021;27:1.10.46292/sci2702-1

[80] [80] Adams MM, Hicks AL. Spasticity after spinal cord injury. Spinal cord. 2005;43:577.10.1038/sj.sc.3101757

[81] [81] Zheng Y, Man Z, Zhang Y, Wu G, Lu W, Chen W. High-performance stretchable supercapacitors based on centrifugal electrospinning-directed hetero-structured graphene-polyaniline hierarchical fabric. Adv Fiber Mater. 2023;5:1759.10.1007/s42765-023-00304-5

[82] [82] Zhu X, Zhang Y, Man Z, Lu W, Chen W, Xu J, Bao N, Chen W, Wu G. Microfluidic-assembled covalent organic frameworks@ Ti3C2Tx MXene vertical fibers for high-performance electrochemical supercapacitors. Adv Mater. 2023;35:2307186.10.1002/adma.202307186

[83] [83] Li S-Q, Liu L, Liang J, Feng Y, Jiang C-Z, Wu W. Enhanced pseudocapacitive performance of CoSnO3 through Mn2+ doping by ion-exchange method for all-printed supercapacitors. Electrochim Acta. 2020;331:135298.10.1016/j.electacta.2019.135298

[84] [84] Feng Y, Liu L, Liang J, Yao W, Tian B, Jiang C, Wu W. Ni(OH)2/NiMoO4 nanoplates for large-scale fully-printed flexible solid-state supercapacitors. J Power Sources. 2019;433:126676.10.1016/j.jpowsour.2019.05.082

[85] [85] Say MG, Brooke R, Edberg J, Grimoldi A, Belaineh D, Engquist I, Berggren M. Spray-coated paper supercapacitors. npj Flex Electron. 2020;4:14.10.1038/s41528-020-0079-8

[86] [86] Zhang C, Wang F, Li Z, Chen H. Dynamic simulation and experimental verification of foam transport in porous media based on level set method. Energy Sci Eng. 2019;7:1795.10.1002/ese3.391