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Thermally insulating and fire-retardant bio-mimic structural composites with a negative Poisson's ratio for battery protection

摘要 Battery safety has attracted considerable attention worldwide due to the rapid development of wearable electronics and the steady increase in the production and use of electric vehicles.As battery failures are often associated with mechanical-thermal coupled behaviors,protective shielding materials with excellent mechanical robustness and flame-retardant properties are highly desired to mitigate thermal runaway.However,most of the thermal insulating materials are not strong enough to protect batteries from mechanical abuse,which is one of the most critical scenarios with catastrophic consequences.Here,inspired by wood,we have developed an effective approach to engineer a hierarchical nanocomposite via self-assembly of calcium silicate hydrate and polyvinyl alcohol polymer chains(referred as CSH wood).The versatile protective material CSH wood demonstrates an unprecedented combination of light weight(0.018 g cm-3),high stiffness(204 MPa in the axial direction),negative Poisson's ratio(-0.15),remarkable toughness(6.67×105 J m-3),superior thermal insula-tion(0.0204 W m-1 K-1 in the radial direction),and excellent fire retardancy(UL94-V0).When applied as a protective cover or a protective layer within battery packages,the tough CSH wood can resist high-impact load and block heat diffusion to block or delay the spread of fire,therefore significantly reducing the risk of property damage or bodily injuries caused by battery explosions.This work provides new pathways for fabricating advanced thermal insulating materials with large scalability and demonstrates great potential for the protection of electronic devices.

doi： 10.1002/cey2.353

作者： Fengyin Du Zuquan Jin Ruizhe Yang Menglong Hao Jiawei Wang Gang Xu Wenqiang Zuo Zifan Geng Hao Pan Tian Li Wei Zhang Wei She

Author： Fengyin Du Zuquan Jin Ruizhe Yang Menglong Hao Jiawei Wang Gang Xu Wenqiang Zuo Zifan Geng Hao Pan Tian Li Wei Zhang Wei She

作者单位： Jiangsu Key Laboratory of Construction Materials,School of Materials Science and Engineering,Southeast University,Nanjing,People's Republic of China School of Mechanical Engineering,Purdue University,West Lafayette,Indiana,USA State Key Laboratory of High-Performance Civil Engineering Materials,Jiangsu Sobute New Materials Co.,Ltd.,Nanjing,People's Republic of China School of Civil Engineering,Qingdao University of Technology,Qingdao,People's Republic of China Department of Mechanical and Aerospace Engineering,University at Buffalo,The State University of New York,Buffalo,New York,USA School of Energy and Environment,Southeast University,Nanjing,People's Republic of China Jiangsu Key Laboratory of Advanced Metallic Materials,School of Materials Science and Engineering,Southeast University,Nanjing,People's Republic of China

刊名碳能源（英文） SCI

年，卷(期)： 2023, 5(12)

Keywords battery protection negative Poisson's ratio thermal insulation toughness wood-inspired materials

机标分类号： S O211.9 O19

在线出版日期： 2024年4月25日

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