One‐Step Synthesis of N/S Codoped “Porous Carbon Cloth” as a Sulfur Carrier for Lithium–Sulfur Batteries,Energy Technology

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One‐Step Synthesis of N/S Codoped “Porous Carbon Cloth” as a Sulfur Carrier for Lithium–Sulfur Batteries
Energy Technology ( IF 3.6 ) Pub Date : 2020-06-26 , DOI: 10.1002/ente.202000188
Zheng Ma ₁ , Xia Xiang ₁ , Chengxiang Tian ₁ , Juwei Wu ₁ , Pengcheng Li ₁ , Bo Li ₁ , Xiaotao Zu ₁ , Sean Li ₂

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The porous biocarbon structure obtained from carbonized starch gel exhibits great potential in energy storage. At the same time, the 3D electrode material exhibits superiority in the field of battery energy storage. Herein, a 3D binderless N/S codoped electrode is obtained by simply carbonization and acid treatment of a carbon cloth electrode coated with a hydroxide/thiourea/starch aqueous solution thermogel. The carbon cloth@nitrogen and sulfur codoped porous carbon (CC@NS) aims at carbon‐bearing sulfur in its surface porous carbon structure. As a result, the CC@NS/S electrode achieves a high initial specific capacity of 1249.9 mAh g⁻¹ at 0.5 C and still has a residual capacity of 752.2 mAh g⁻¹ after 350 cycles. The N, O, and S dopants provide abundant electrocatalytic active sites in the chemical bonding of polysulfides and their accelerated redox kinetics to improve utilization of active materials. Herein, the way for the versatile sulfur‐based design of advanced lithium‐ion batteries is paved.

中文翻译：

N / S共掺杂“多孔碳布”作为锂硫电池硫载体的一步合成

由碳化淀粉凝胶获得的多孔生物碳结构在储能方面显示出巨大潜力。同时，3D电极材料在电池储能领域表现出优势。在此，通过简单地碳化和酸处理涂覆有氢氧化物/硫脲/淀粉水溶液热凝胶的碳布电极，获得3D无粘合剂N / S共掺杂电极。碳布@氮和硫共掺杂多孔碳（CC @ NS）旨在在其表面多孔碳结构中含碳硫。结果，CC @ NS / S电极在0.5 C时可实现1249.9 mAh g ^-1的高初始比容量，而剩余容量仍为752.2 mAh g ^-1经过350次循环。N，O和S掺杂剂在多硫化物的化学键合及其加速的氧化还原动力学中提供了丰富的电催化活性位，以提高活性材料的利用率。在此，为高级锂离子电池的基于硫的多功能设计铺平了道路。

更新日期：2020-06-26

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