Constructing High-Performance Lithium-Ion Hybrid Capacitors Based on the Electrode Framework Matching Strategy
Constructing High-Performance Lithium-Ion Hybrid Capacitors Based on the Electrode Framework Matching Strategy
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基于电极框架匹配策略构建高性能锂离子混合电容器
DOI：
10.1021/acsaem.1c03492
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发表时间：
2022-01
影响因子：
6.4
通讯作者：
Qinglei Liu
中科院分区：
文献类型：
--
作者：
Boya Sun;Ning Wang;Mingming Li;Yan Fang;Jiajun Gu;Wei Sun;Wang Zhang;Di Zhang;Qinglei Liu
锂离子电容器（LICs）具有高能量密度和高功率密度，可以很好地弥补锂离子电池和超级电容器之间的差距，是一种很有前途的储能器件。然而，它们的储能性能受到电容器型阴极和电池型阳极之间的电化学容量和动力学不平衡的影响。在这里，电极框架匹配策略的报告，可以最大限度地减少对电极之间的这些差异。基于仿生微相分离机制，制备了具有相同互连介孔碳骨架但不同组装活性位点的阳极和阴极材料。由于丰富的活性位点和功能的电子/离子传输架构在两个电极的优化集成，组装的LIC提供高达257和124瓦时kg-1的功率密度为53和10 010 W kg-1，分别超过以前报道的LIC同行的高能量密度。这项工作提供了一个基于框架的设计策略，以及一个可扩展的制造方法的纳米结构的电极材料向高性能的LIC。
Lithium-ion capacitors (LICs) are promising energy-storage devices owing to their high energy densities and power densities that can well bridge the gap between lithium-ion batteries and supercapacitors. However, their energy-storage performance suffers from electrochemical capacity and kinetics imbalances between capacitor-type cathodes and battery-type anodes. Here, an electrode framework matching strategy is reported that can minimize these disparities between the counter electrodes. Based on a biomimic microphase separation mechanism, anode and cathode materials with the same interconnected mesoporous carbon framework but different assembled active sites have been fabricated. Due to the optimized integration of abundant active sites and functional electron/ion transport architectures in both electrodes, the assembled LICs deliver high energy densities up to 257 and 124 Wh kg–1at power densities of 53 and 10 010 W kg–1, respectively, exceeding previously reported LIC counterparts. The work provides a framework-based design strategy as well as a scalable fabrication method of nanostructured electrode materials toward high-performance LICs.
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