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首页> 外文期刊>Advanced Materials >Self-Supporting, Flexible, Additive-Free, and Scalable Hard Carbon Paper Self-Interwoven by 1D Microbelts: Superb Room/Low-Temperature Sodium Storage and Working Mechanism
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Self-Supporting, Flexible, Additive-Free, and Scalable Hard Carbon Paper Self-Interwoven by 1D Microbelts: Superb Room/Low-Temperature Sodium Storage and Working Mechanism

机译：一维微带自交织而成的自支撑，灵活，无添加剂和可扩展的硬碳纸：出色的室温/低温钠存储和工作机制

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摘要

Hard carbon is regarded as a promising anode material for sodium-ion batteries (SIBs). However, it usually suffers from the issues of low initial Coulombic efficiency (ICE) and poor rate performance, severely hindering its practical application. Herein, a flexible, self-supporting, and scalable hard carbon paper (HCP) derived from scalable and renewable tissue is rationally designed and prepared as practical additive-free anode for room/low-temperature SIBs with high ICE. In ether electrolyte, such HCP achieves an ICE of up to 91.2% with superior high-rate capability, ultralong cycle life (e.g., 93% capacity retention over 1000 cycles at 200 mA g(-1)) and outstanding low-temperature performance. Working mechanism analyses reveal that the plateau region is the rate-determining step for HCP with a lower electrochemical reaction kinetics, which can be significantly improved in ether electrolyte.
机译：硬碳被认为是钠离子电池（SIB）的有希望的负极材料。然而，它通常遭受初始库仑效率（ICE）低和速率性能差的问题，严重地阻碍了其实际应用。本文中，合理设计并制备了可伸缩和可再生组织衍生出的柔性，自支撑且可伸缩的硬碳纸（HCP），作为具有高ICE的室温/低温SIB的实用无添加剂阳极。在醚电解质中，此类HCP具有卓越的高倍率能力，超长循环寿命（例如在200 mA g（-1）下1000次循环中93％的容量保持率）和出色的低温性能，可实现高达91.2％的ICE。工作机理分析表明，高原区域是HCP的速率决定步骤，电化学反应动力学较低，在醚电解质中可以显着改善。

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