电解质
阳极
功率密度
离子
材料科学
储能
能量密度
自行车
超级电容器
功率(物理)
化学
电化学
阴极
化学工程
分析化学(期刊)
工程物理
热力学
电极
物理化学
物理
色谱法
工程类
有机化学
考古
历史
作者
Xian‐Kun Hou,Shaofang Li,Wenhao Li,Haojie Liang,Zhen‐Yi Gu,Xiaoxi Luo,Xing‐Long Wu
标识
DOI:10.1002/batt.202100124
摘要
Abstract Dual‐ion batteries (DIBs) have attracted great research interests owing to the co‐utilization of cation and anion as charge carriers. Unlike the low energy density ( E den ) of supercapacitors and halogen‐ion batteries also with anion working, graphite‐cathode‐based DIBs exhibit obviously higher E den with high working voltage. However, general electrolytes cannot satisfy the high‐energy demand for Na‐based DIBs with high power density. Herein, we design an effective electrolyte with optimized performance to limit the occurrence of side reactions during cycling, improving the cycling stability and E den of Na‐based DIBs. Such electrolyte‐modified Na‐DIBs exhibit higher discharge plateau and specific capacity compared to the pristine batteries, contribute preeminent E den of 370.4 Wh/kg at a high‐power density of 8888.4 W/kg (2.0 A/g), and deliver higher capacity retention of 72 % after 1000 cycles under 40 °C (1.0 A/g). All of these improvements are attributed to the interphase protection of anode/cathode by modified electrolyte, and the increase of diffusion ability under high potential. This strategy not only provides reference significance for enhancing the performance of DIBs, but also promotes the development of DIBs with high‐power/energy and long‐term cycle working condition.
科研通智能强力驱动
Strongly Powered by AbleSci AI