材料科学
离子
离子键合
化学物理
电子
热扩散率
电化学
扩散
离子运输机
电子传输链
储能
电极
原子物理学
纳米技术
分析化学(期刊)
物理化学
热力学
化学
物理
量子力学
生物化学
功率(物理)
有机化学
色谱法
作者
Jiewei Chen,Bi Luo,Qiushui Chen,Fĕi Li,Yanjiao Guo,Tom Wu,Peng Peng,Xian Qin,Guang Wu,Mengqi Cui,Lehao Liu,Lihua Chu,Bing Jiang,Yingfeng Li,X. G. Gong,Yang Chai,Yongping Yang,Yonghua Chen,Wei Huang,Xiaogang Liu,Yingfeng Li
标识
DOI:10.1002/adma.201905578
摘要
Abstract The rate‐determining process for electrochemical energy storage is largely determined by ion transport occurring in the electrode materials. Apart from decreasing the distance of ion diffusion, the enhancement of ionic mobility is crucial for ion transport. Here, a localized electron enhanced ion transport mechanism to promote ion mobility for ultrafast energy storage is proposed. Theoretical calculations and analysis reveal that highly localized electrons can be induced by intrinsic defects, and the migration barrier of ions can be obviously reduced. Consistently, experiment results reveal that this mechanism leads to an enhancement of Li/Na ion diffusivity by two orders of magnitude. At high mass loading of 10 mg cm −2 and high rate of 10C, a reversible energy storage capacity up to 190 mAh g −1 is achieved, which is ten times greater than achievable by commercial crystals with comparable dimensions.
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