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- Title
Highly Durable and Ultrafast Cycling of Dual‐Ion Batteries via In Situ Construction of Cathode–Electrolyte Interphase.
- Authors
Cheng, Zhenjie; Guo, Longfei; Dong, Qingyu; Wang, Chunting; Yao, Qian; Gu, Xin; Yang, Jian; Qian, Yitai
- Abstract
Dual‐ion batteries have shown promising prospect in energy storage, owing to their low material costs, high power capability, and environmental friendliness. However, graphite as the cathode always suffers from structural damage and electrode/electrolyte interface instability, which greatly deteriorate their electrochemical performance. Here, tris(trimethyl‐silyl) phosphite (TMSP) is added as an electrolyte additive to improve the electrochemical performance. TMSP not only scavenges the deleterious species generated by electrolytes, but also produces a thin and uniform cathode–electrolyte interphase layer on graphite. Hence, the electrochemical performance is greatly promoted. In graphite||graphite, the capacity retention is ≈96.8% at 30 °C or 92.5% after 3000 cycles in the presence of TMSP, much better than those without TMSP (62% at 30 °C or 27% after 200 cycles).
- Subjects
ENERGY storage; STORAGE batteries; ELECTROLYTES; GRAPHITE
- Publication
Advanced Energy Materials, 2022, Vol 12, Issue 44, p1
- ISSN
1614-6832
- Publication type
Article
- DOI
10.1002/aenm.202202253