[1] [1] ZHANG Y Z, WANG Y, CHENG T, et al. Flexible supercapacitors based on paper substrates: a new paradigm for low-cost energy storage［J］. Chemical Society Reviews, 2015, 44(15): 5181-5199.

[2] [2] SIMON P, GOGOTSI Y, DUNN B. Where do batteries end and supercapacitors begin?［J］. Science, 2014, 343(6176): 1210-1211.

[3] [3] YANG G W, XU C L, LI H L. Electrodeposited nickel hydroxide on nickel foam with ultrahigh capacitance［J］. Chemical Communications (Cambridge, England), 2008(48): 6537-6539.

[4] [4] TIAN J, SHAN Q, YIN X L, et al. A facile preparation of graphene/reduced graphene oxide/Ni(OH)2 two dimension nanocomposites for high performance supercapacitors［J］. Advanced Powder Technology, 2019, 30(12): 3118-3126.

[5] [5] LAI L Q, LIN Y M, SU S Y, et al. Preparation and electrochemical performance of multilayered Ni(OH)2 nanoflakes with different orientations uniformly anchored on reduced graphene oxide sheets［J］. Journal of Energy Storage, 2021, 35: 102295.

[6] [6] LI W S, SHIH Y C, CHENG H C. Green synthesis of CNTs/Ni(OH)2 nanostructures for electrochemical supercapacitors［J］. Chemical Physics Letters, 2020, 750: 137499.

[7] [7] VAHIDMOHAMMADI A, MOJTABAVI M, CAFFREY N M, et al. Assembling 2D MXenes into highly stable pseudocapacitive electrodes with high power and energy densities［J］. Advanced Materials, 2019, 31(8): 1806931.

[8] [8] VISWANATHAN A, SHETTY A N. The high energy supercapacitor from rGO/Ni(OH)2/PANI nanocomposite with methane sulfonic acid as dopant［J］. Journal of Colloid and Interface Science, 2019, 557: 367-380.

[9] [9] WANG J J, XIAO G Y, ZHANG T Q, et al. Fabrication of Co3O4/polyaniline-based carbon electrode for high-performance supercapacitor［J］. Journal of Alloys and Compounds, 2021, 863: 158071.

[10] [10] ZHANG L Y, SHI D W, LIU T, et al. Nickel-based materials for supercapacitors［J］. Materials Today, 2019, 25: 35-65.

[11] [11] MIN S D, ZHAO C J, ZHANG Z M, et al. Synthesis of Ni(OH)2/RGO pseudocomposite on nickel foam for supercapacitors with superior performance［J］. Journal of Materials Chemistry A, 2015, 3(7): 3641-3650.

[12] [12] YAN J, FAN Z J, SUN W, et al. Advanced asymmetric supercapacitors based on Ni(OH)2/graphene and porous graphene electrodes with high energy density［J］. Advanced Functional Materials, 2012, 22(12): 2632-2641.

[13] [13] XIAN Q L, LI J. Preparation and electrochemical capacitance of α-Ni(OH)2 synthe-sized by microwave-assisted hydrothermal method［J］. Journal of Inorganic Materials, 2011, 25(12): 1268-1272.

[14] [14] LEE J W, AHN T, SOUNDARARAJAN D, et al. Non-aqueous approach to the preparation of reduced graphene oxide/α-Ni(OH)2 hybrid composites and their high capacitance behavior［J］. Chemical Communications (Cambridge, England), 2011, 47(22): 6305-6307.