Authors
Xu-Sheng Zhang, Jici Wen, Zhen-Zhen Shen, Xin Zhang, Jian-Xin Tian, Rui-Zhi Liu, Zehui Zhang, Kai-Xiang Zhou, Shuang-Yan Lang, Wen-Peng Wang, Sen Xin, Rui Wen, Yujie Wei, Li-Jun Wan, Yu-Guo Guo
Published in
Science advances. Volume 12. Issue 35. Pages eaef3043. Aug 28, 2026. Epub Aug 26, 2026.
Abstract
Silicon anodes present a compelling alternative to lithium metal for all-solid-state batteries (ASSBs), offering high capacity without dendrite risks. However, their application is hindered by incomplete understanding of electro-chemo-mechanical (ECM) failure mechanisms in all-solid-state configurations. Through multiple in situ characterizations combining optical microscopy, atomic force microscopy, and pressure monitoring, this work uncovers fundamental stress-mediated degradation pathways in silicon-based ASSBs. Stress evolution-particularly in-plane strain mismatch and out-of-plane mechanical constraints-governs the dominant failure criterion, superseding traditional volume change metrics. This stress-dominated mechanism arises from the interplay between volume and modulus in constrained all-solid-state systems. Guided by these insights, complementary mitigation strategies were developed, including electrode/electrolyte modulus engineering to reduce interfacial stresses and elastic constraint design to accommodate mechanical fluctuations. The synergistic implementation achieves near-zero stress variation and breakthrough cycling stability (90.1% capacity retention after 5000 cycles). This work establishes a paradigm for high-energy-density batteries, shifting the design focus from volume accommodation to comprehensive stress management in all-solid-state systems.
PMID:
42647632
Bibliographic data and abstract were imported from PubMed on 27 Aug 2026.
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