A Self‐Healing Chemistry‐Enabled Organic Cathode for Sustainable and Stable Sodium‐Ion Batteries
A Self‐Healing Chemistry‐Enabled Organic Cathode for Sustainable and Stable Sodium‐Ion Batteries
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DOI：
10.1002/sstr.202300211
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发表时间：
2023-08
期刊：
影响因子：
15.9
通讯作者：
Jin-Shu Huang;Shi Li;E. Kim;Lei Cheng;Gui‐Liang Xu;K. Amine;Chunsheng Wang;Chao Luo
中科院分区：
文献类型：
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作者：
Jin-Shu Huang;Shi Li;E. Kim;Lei Cheng;Gui‐Liang Xu;K. Amine;Chunsheng Wang;Chao Luo
钠电池(SIB)是锂离子电池(LIB)的理想替代品，具有成本低、资源丰富、可持续利用等优点。与LIBS类似，SIB中的大容量电极在长时间的循环中，由于大体积变化引起的颗粒粉化，总是遭受容量的快速衰减。防止颗粒粉化是发展高能、长寿命SIB的关键。其中，四羟基-1，4-苯二酚二钠(TBDS)可以通过羟基和羰基之间的氢键自修复裂纹，作为可持续稳定的SIBS的阴极。由于负极中钠离子的快速扩散反应，自愈合正极材料表现出长达1000次的循环寿命和高达2A g−1的高倍率能力。对分子间氢键进行了全面的表征，以了解其自愈机制。氢键自修复有机材料在开发高能、长寿命SIB方面具有广阔的应用前景。
Sodium‐on batteries (SIBs) are promising alternatives to lithium‐ion batteries (LIBs) because of the low cost, abundance, and high sustainability of sodium resources. Analogous to LIBs, the high‐capacity electrodes in SIBs always suffer from rapid capacity decay upon long‐term cycling due to the particle pulverization induced by a large volume change. Circumventing particle pulverization plays a critical role in developing high‐energy and long‐life SIBs. Herein, tetrahydroxy‐1,4‐benzoquinone disodium salt (TBDS) that can self‐heal the cracks by hydrogen bonding between hydroxyl group and carbonyl group is employed as a cathode for sustainable and stable SIBs. The self‐healing TBDS exhibits long cycle life of 1000 cycles with a high rate capability up to 2 A g−1 due to the fast Na‐ion diffusion reaction in the TBDS cathode. The intermolecular hydrogen bonding has been comprehensively characterized to understand the self‐healing mechanism. The hydrogen bonding‐enabled self‐healing organic materials are promising for developing high‐energy and long‐cycle‐life SIBs.