阳极
材料科学
超级电容器
电容器
电解质
阴极
锂(药物)
电池(电)
离子
纳米技术
能量密度
氧化物
功率密度
电极
工程物理
电容
功率(物理)
电气工程
电压
冶金
化学
内分泌学
工程类
物理化学
物理
有机化学
医学
量子力学
作者
Huanwen Wang,Changrong Zhu,Dongliang Chao,Qingyu Yan,Hong Jin Fan
标识
DOI:10.1002/adma.201702093
摘要
Abstract Hybrid metal‐ion capacitors (MICs) (M stands for Li or Na) are designed to deliver high energy density, rapid energy delivery, and long lifespan. The devices are composed of a battery anode and a supercapacitor cathode, and thus become a tradeoff between batteries and supercapacitors. In the past two decades, tremendous efforts have been put into the search for suitable electrode materials to overcome the kinetic imbalance between the battery‐type anode and the capacitor‐type cathode. Recently, some transition‐metal compounds have been found to show pseudocapacitive characteristics in a nonaqueous electrolyte, which makes them interesting high‐rate candidates for hybrid MIC anodes. Here, the material design strategies in Li‐ion and Na‐ion capacitors are summarized, with a focus on pseudocapacitive oxide anodes (Nb 2 O 5 , MoO 3 , etc.), which provide a new opportunity to obtain a higher power density of the hybrid devices. The application of Mxene as an anode material of MICs is also discussed. A perspective to the future research of MICs toward practical applications is proposed to close.
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