Open AccessPulverization‐Tolerance and Capacity Recovery of Copper Sulfide for High‐Performance Sodium Storage
Author(s) -
Park Jae Yeol,
Kim Sung Joo,
Yim Kanghoon,
Dae Kyun Seong,
Lee Yonghee,
Dao Khoi Phuong,
Park Ji Su,
Jeong Han Beom,
Chang Joon Ha,
Seo Hyeon Kook,
Ahn Chi Won,
Yuk Jong Min
Publication year - 2019
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.201900264
Subject(s) - copper , sulfide , chemistry , copper sulfide , sodium , sodium sulfide , chemical engineering , materials science , inorganic chemistry , organic chemistry , engineering
Finding suitable electrode materials is one of the challenges for the commercialization of a sodium ion battery due to its pulverization accompanied by high volume expansion upon sodiation. Here, copper sulfide is suggested as a superior electrode material with high capacity, high rate, and long‐term cyclability owing to its unique conversion reaction mechanism that is pulverization‐tolerant and thus induces the capacity recovery. Such a desirable consequence comes from the combined effect among formation of stable grain boundaries, semi‐coherent boundaries, and solid‐electrolyte interphase layers. The characteristics enable high cyclic stability of a copper sulfide electrode without any need of size and morphological optimization. This work provides a key finding on high‐performance conversion reaction based electrode materials for sodium ion batteries.