超级电容器
电容
材料科学
微型多孔材料
储能
电流密度
功率密度
石墨烯
能量密度
氧化物
电极
介孔材料
金属有机骨架
复合材料
化学工程
纳米技术
功率(物理)
工程物理
化学
冶金
催化作用
有机化学
物理化学
吸附
物理
生物化学
量子力学
工程类
作者
Rupam Sahoo,Souvik Ghosh,Santanu Chand,Shyam Chand Pal,Tapas Kuila,Madhab C. Das
标识
DOI:10.1016/j.compositesb.2022.110174
摘要
Supercapacitors are projected as one of the most promising candidates for next-generation energy storage devices. Herein, we strategically developed a microporous two-dimensional Ni-metal organic framework (MOF: IITKGP-20A, IITKGP stands for the Indian Institute of Technology Kharagpur) which is highly scalable and thermodynamically stable over a wide pH range (2–10), intended for energy storage applications. Graphene oxide (GO) with different wt% (3, 5, and 7) was introduced with the MOF precursors to form in-situ [email protected] composites (IITKGP-20A-GO3, IITKGP-20A-GO5, and IITKGP-20A-GO7 respectively), out of which IITKGP-20A-GO3 exhibits significantly high specific capacitance value (∼840 F g−1 at 2 A g−1), which is one of the highest among the bare MOFs and their composites/derived materials. To verify its practical potentiality as positive electrode material, an asymmetric supercapacitor (ASC) device was fabricated displaying the specific capacitance of 111.4 F g−1 at a current density of 2 A g−1 while maintaining a high specific capacity of 65 F g−1 even at a higher current density of 10 A g−1. Moreover, the device produced 30.7 W h kg−1 (0.031 W h cm−3) energy density with a very high power density of 388.5 W kg−1 (0.394 W cm−3) with excellent retention of 84% cycle life up to 7000 cycles.
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