期刊
ADVANCED SCIENCE
卷 6, 期 12, 页码 -出版社
WILEY
DOI: 10.1002/advs.201900264
关键词
capacity recovery; pulverization tolerance; semi-coherent interfaces; sodium ion batteries; transmission electron microscopy
资金
- National Research Foundation of Korea (NRF) - Korea government (MSIP
- Ministry of Science, ICT & Future Planning) [NRF-2018R1C1B6002624]
- NRF - Korea government (MSIP
- Ministry of Science, ICT & Future Planning) [NRF-2018M3A7B4065625, NRF-2016M3A7B4024138]
- Global Research Development Center Program through the NRF - Ministry of Science and ICT(MSIT) [2015K1A4A3047100]
- Nano.Material Technology Development Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT, and Future Planning [2009-0082580]
- NRF funded Korea government (MSIP
- Ministry of Science, ICT & Future Planning) [NRF-2018H1A2A1060105]
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.
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