Kangjia Hu, Jiahui Zhang, Xinrun Yu, Jin-Bao Wang, Xianluo Hu
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引用次数: 0
Abstract
Silicon anodes promise revolutionary lithium-ion battery energy density, yet commercial viability remains constrained by catastrophic volume expansion and interfacial degradation under demanding thermal conditions. Here, we demonstrate engineered crack pinning mechanisms within a gradient-structured hybrid solid-electrolyte interphase (H-SEI) that enables unprecedented cycling stability of micro-sized silicon anodes across extreme temperatures. The dual-layer H-SEI architecture features nanocrystalline inorganic domains providing grain-boundary strengthening, while polymer-integrated outer layers incorporate distributed nanocrystals as crack arresters, preventing fracture propagation through synergistic stress redistribution. This crack pinning strategy maintains structural integrity under ~200% volumetric expansion, preserving continuous wide-temperature lithium-ion transport. Paired with NCM811 cathodes, 1-Ah pouch cells exhibit long cycle life, retaining >80% capacity from −20 °C to 70 °C over extended cycling, substantially exceeding existing silicon technologies. These findings establish crack pinning as a transformative approach for thermally-robust silicon batteries, enabling next-generation energy storage across diverse environmental conditions.
期刊介绍:
Energy & Environmental Science, a peer-reviewed scientific journal, publishes original research and review articles covering interdisciplinary topics in the (bio)chemical and (bio)physical sciences, as well as chemical engineering disciplines. Published monthly by the Royal Society of Chemistry (RSC), a not-for-profit publisher, Energy & Environmental Science is recognized as a leading journal. It boasts an impressive impact factor of 8.500 as of 2009, ranking 8th among 140 journals in the category "Chemistry, Multidisciplinary," second among 71 journals in "Energy & Fuels," second among 128 journals in "Engineering, Chemical," and first among 181 scientific journals in "Environmental Sciences."
Energy & Environmental Science publishes various types of articles, including Research Papers (original scientific work), Review Articles, Perspectives, and Minireviews (feature review-type articles of broad interest), Communications (original scientific work of an urgent nature), Opinions (personal, often speculative viewpoints or hypotheses on current topics), and Analysis Articles (in-depth examination of energy-related issues).