金属双亲硫硼化镍实现高电流密度运行稳健的锂电池

IF 9.6 1区化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Materials Letters Pub Date : 2024-11-04 DOI:10.1021/acsmaterialslett.4c0188510.1021/acsmaterialslett.4c01885

Xin He, Zhaotian Xie, Wentao Zhang, Ziyao Gao, Yan Cheng, Xinming Zhang, Yan-Bing He, Feiyu Kang* and Lele Peng*,

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引用次数: 0

摘要

在高电流密度下实现锂硫电池的高硫负载和稳健循环是一项挑战。利用金属催化剂在高负载高电流下改善硫阴极内的电荷转移和多硫锂多硫化物（LiPSs）的转化是一种很有前景的方法。本研究探讨了金属硼化镍（NiB）作为促进电荷转移和LiPS转化的催化剂。理论和实验结果表明，NiB可加速硫氧化还原动力学，显著提高电池性能。当含硫量为5 mg cm-2, 0.5℃循环时，nib基电池的放电容量为1239 mAh g-1，循环150次后的放电容量为83.2%。即使在14.89 mA cm-2的电流密度下，其容量仍保持在590 mAh g-1，衰减率仅为0.07%。这种方法突出了金属硼化物催化剂在实际锂硫电池应用中的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Operationally Robust Li–S Batteries at High Current Density Enabled by Metallic, Dual Sulfurphilic Nickel Boride

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Operationally Robust Li–S Batteries at High Current Density Enabled by Metallic, Dual Sulfurphilic Nickel Boride

Achieving high sulfur loading and robust cycling in lithium–sulfur (Li–S) batteries under a high current density is challenging. Employing metallic catalysts to improve the charge transfer and the polysulfide lithium polysulfide (LiPSs) conversion within the sulfur cathode under a high current with a high sulfur loading represents a promising approach. This study explores metallic nickel boride (NiB) as a catalyst to enhance charge transfer and LiPS conversion. Theoretical and experimental results reveal that NiB accelerates sulfur redox kinetics, significantly improving the battery performance. With a sulfur loading of 5 mg cm^–2 cycled at 0.5 C, the NiB-based battery achieved a discharge capacity of 1239 mAh g^–1, retaining 83.2% after 150 cycles. Even at a current density of 14.89 mA cm^–2, it maintained a capacity of 590 mAh g^–1 with a low decay rate of 0.07%. This approach highlights the potential of metal boride catalysts for practical Li–S battery applications.

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来源期刊

ACS Materials Letters MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

14.60

自引率

3.50%

发文量

261

期刊介绍： ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.