Flexible Cellulose Paper-based Asymmetrical Thin Film Supercapacitors with High-Performance for Electrochemical Energy Storage
Flexible Cellulose Paper-based Asymmetrical Thin Film Supercapacitors with High-Performance for Electrochemical Energy Storage
复制标题
用于电化学储能的高性能柔性纤维素纸基不对称薄膜超级电容器
DOI：
10.1002/adfm.201401876
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发表时间：
2014-12-03
影响因子：
19
通讯作者：
Li, Gao-Ren
中科院分区：
文献类型：
--
作者：
Feng, Jin-Xian;Ye, Sheng-Hua;Li, Gao-Ren
基于纤维素纸(CP)的非对称薄膜超级电容器(ATFSC)因其成本低、重量轻、可卷曲或折叠成3D形状而被认为是廉价和便携式设备的新型平台。然而，能量密度低、循环稳定性差是制约CP基ATFSCs发展的严重瓶颈。本文研制了三明治结构的石墨/Ni/CO_2 NiO_4-CP作为正极，石墨/Ni/AC-CP作为负极，实现了柔性高性能的ATFSCs。制备的石墨/Ni/Co2NiO4-CP正极材料具有较好的面电容(在5 mV/S下为734mF/cm2)和良好的循环性能，15000次循环后的Csp保持率接近97.6%。制备的石墨/镍/AC-CP负极还具有较大的面积电容(在5 mV/S下为180mF/cm2)和良好的循环性能，15000次循环后C-SP保留率接近98%。以石墨/Ni/Co2NiO4-CP为正极，石墨/Ni/AC-CP为负极组装的ATFSCs具有较大的C-SP体积(5 mV/S时为7.6F/cm(3))、高的体积能量密度(2.48MWh/cm(3)、80Wh/kg)、高的体积功率密度(0.79W/cm(3)、25.6kW/kg)和良好的循环稳定性(20000次循环后C-SP损失率小于4%)。这项研究表明，在设计和制造高性能和柔性的CP基电极和ATFSCs方面取得了重大突破。
Cellulose paper (CP)-based asymmetrical thin fi lm supercapacitors (ATFSCs) have been considered to be a novel platform for inexpensive and portable devices as the CP is low-cost, lightweight, and can be rolled or folded into 3D confi gurations. However, the low energy density and poor cycle stability are serious bottlenecks for the development of CP-based ATFSCs. Here, sandwich-structured graphite/Ni/Co2 NiO4-CP is developed as positive electrode and the graphite/Ni/AC-CP as negative electrode for fl exible and high-performance ATFSCs. The fabricated graphite/Ni/Co2NiO4-CP positive electrode shows a superior areal capacitance (734 mF/cm2 at 5 mV/s) and excellent cycling performance with similar to 97.6% C sp retention after 15 000 cycles. The fabricated graphite/Ni/AC-CP negative electrode also exhibits large areal capacitance (180 mF/cm(2) at 5 mV/s) and excellent cycling performance with approximate to 98% C-sp retention after 15 000 cycles. The assembled ATFSCs based on the sandwich-structured graphite/Ni/Co2NiO4-CP as positive electrode and graphite/Ni/AC-CP as negative electrode exhibit large volumetric C-sp (7.6 F/cm(3) at 5 mV/s), high volumetric energy density (2.48 mWh/cm(3), 80 Wh/kg), high volumetric power density (0.79 W/cm(3), 25.6 kW/kg) and excellent cycle stability (less 4% C-sp loss after 20 000 cycles). This study shows an important breakthrough in the design and fabrication of high-performance and fl exible CP-based electrodes and ATFSCs.