Authors
Jiahe Chen, Fangkun Li, Lei Xi, Shiman He, Linwei Zhao, Jun Zeng, Jinpeng Lin, Zhaoyu Sun, Conghui Zhang, Yihong Tong, Chenchen Li, Zhijun Wu, Hongge Pan, Jingwei Zhao, Min Zhu, Jun Liu
Published in
Nature communications. Jul 16, 2026. Epub Jul 16, 2026.
Abstract
Enhancing high-capacity silicon-graphite negative electrodes and high-voltage positive electrodes is crucial for improving specific energy of lithium-ion batteries. However, challenges like large volume change in silicon-graphite electrode and electrolyte decomposition at high voltage compromise electrochemical stability. Furthermore, sluggish Li+ exchange between electrolytes and electrodes severely hinders electrochemical kinetics. Herein, we design an anion-rich electrolyte with high oxidation resistance and rapid desolvation behavior, which enabling the formation of effective interphases for improving electrochemical performance. The optimized electrolyte allows silicon-graphite electrode to achieve 1838.9 mAh g-1 capacity at 0.1 C with a long-term electrochemical stability, while a lithium-rich layered oxide positive electrode maintains 72.3% retention after 600 cycles at 1 C. The designed electrolyte with nonflammability also enhances safety in pouch cells after nail penetration. This design significantly improves cycling stability in high-specific-energy batteries, reaching specific energy of 278 Wh kg-1 for graphite | |lithium-rich layered oxide and 355 Wh kg-1 for silicon-graphite | |Ni-rich layer oxide pouch cells, calculated based on all cell components (positive electrode, negative electrode, separator and electrolyte). The design of the high-voltage electrolyte introduces a feasible approach to formulate a suitable solvation structure for high-specific-energy batteries.
PMID:
42463678
Bibliographic data and abstract were imported from PubMed on 17 Jul 2026.
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