Authors
Qianqian Guo, Xianlei Shen, Yunyun Zhai, Yanyan Ma, Qian Liu, Rui Luo, Chao Chen, Jianlong Ye, Peng Zhang, Jianhua Yan
Published in
Small (Weinheim an der Bergstrasse, Germany). Pages e76038. Sep 27, 2026. Epub Sep 27, 2026.
Abstract
In practical Si/C anode-based quasi-solid-state lithium batteries, the solid-electrolyte interphase (SEI) instability arises from spatial heterogeneity and temporal accumulation of Li+-flux during conventional constant-current formation. Here, we report a synergistic spatiotemporal regulation strategy for Li+-flux to guide uniform SEI evolution specifically during formation. Spatially, a piezoelectric BaTiO3/poly(vinylidene fluoride)-block-poly(tetrafluoroethylene) gel polymer electrolyte film is constructed, which utilizes a local polarization electric field to promote a more uniform Li+-flux distribution near the electrode-electrolyte interface. Temporally, a bipolar pulse formation protocol is employed, which interrupts continuous Li+ accumulation via discontinuous current input, providing necessary Li+ relaxation periods. This synergy optimizes the spatial pathway and temporal rhythm of Li+ at the early SEI formation stage, suppressing potential fluctuations and local Li+ enrichment. Consequently, a smooth, dense, high-modulus SEI is formed between the anode and electrolyte. Benefiting from this robust SEI, Ah-level NCM811||Si/C full cells exhibit enhanced interfacial stability and prolonged cycling performance. This work highlights the critical role of formation-process engineering in stabilizing the SEI and offers a practical route toward high-performance quasi-solid-state lithium batteries.
PMID:
42801475
Bibliographic data and abstract were imported from PubMed on 28 Sep 2026.
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