“自基体”双晶的异步反应可有效适应电极材料的体积膨胀/收缩，同时增强储钠性能。

Asynchronous reactions of "self-matrix" dual-crystals effectively accommodating volume expansion/shrinkage of electrode materials with enhanced sodium storage.

作者信息

Hao Youchen, Li Xifei, Liu Wen, Maleki Kheimeh Sari Hirbod, Qin Jian, Li Yingying

机构信息

Institute of Advanced Electrochemical Energy & School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, Shaanxi 710048, China.

出版信息

Chem Commun (Camb). 2019 Jul 30;55(62):9076-9079. doi: 10.1039/c9cc03406d.

DOI:10.1039/c9cc03406d

PMID:31314023

Abstract

The large volume expansion of FeS2 is successfully accommodated via a series of asynchronous redox reactions of dual-crystalline FeS2. Consequently, a durable sodium storage performance with a reversible capacity of 567.7 mA h g-1 is obtained at 0.1 A g-1 after 50 cycles. This novel strategy can also be utilized in other types of electrodes having large volume change upon cycling.

摘要

通过双晶FeS₂的一系列异步氧化还原反应，成功地适应了FeS₂的大体积膨胀。因此，在0.1 A g⁻¹的电流密度下循环50次后，获得了具有567.7 mA h g⁻¹可逆容量的持久储钠性能。这种新策略也可用于其他在循环时具有大体积变化的电极类型。