Boron/phosphorus co-doped nitrogen-rich carbon nanofiber with flexible anode for robust sodium-ion battery

IF 9.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Chinese Chemical Letters Pub Date : 2024-09-12 DOI:10.1016/j.cclet.2024.110452
Jiaojiao Liang , Youming Peng , Zhichao Xu , Yufei Wang , Menglong Liu , Xin Liu , Di Huang , Yuehua Wei , Zengxi Wei
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Abstract

Flexible energy storage devices have been paid much attention and adapts to apply in various fields. Benefiting from the active sites of boron (B) and phosphorus (P) doping materials, co-doped carbon materials are widely used in energy storage devices for the enhanced electrochemical performance. Herein, B and P co-doped flexible carbon nanofibers with nitrogen-rich (B-P/NC) are investigated with electrospinning for sodium-ion battery. The flexible of binderless B-P/NC with annealing of 600 °C (B-P/NC-600) exhibits the remarkable performance for the robust capacity of 200 mAh/g at 0.1 A/g after 500 cycles and a durable reversible capacity of 160 mAh/g even at 1 A/g after 12,000 cycles, exhibiting the equally commendable stability of flexible B-P/NC-600. In addition, B-P/NC-600 delivers the reversible capacity of 265 mAh/g with the test temperature of 60 °C. More importantly, the flexible B-P/NC-600 is fabricated as anode for the whole battery, delivering the capacity of 90 mAh/g at 1 A/g after 200 cycles. Meanwhile, theoretical calculation further verified that boron and phosphorus co-doping can improve the adsorption capacity of nitrogen carbon materials. The favorable performance of flexible B-P/NC-600 can be ascribed to the nitrogen-rich carbon nanofibers with three-dimensional network matrix for the more active site of boron and phosphorus co-doping. Our work paves the way for the improvement of flexible anodes and wide-operating temperature of sodium-ion batteries by doping approach of much heteroatom.

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具有柔性阳极的硼/磷共掺富氮碳纳米纤维,可用于制造坚固耐用的钠离子电池
柔性储能装置已被广泛关注并应用于各个领域。得益于硼(B)和磷(P)掺杂材料的活性位点,共掺杂碳材料被广泛应用于储能器件,以增强其电化学性能。本文利用电纺丝技术研究了富氮(B-P/NC)的硼和磷共掺杂柔性碳纳米纤维在钠离子电池中的应用。退火温度为 600 °C 的无粘合剂 B-P/NC 柔性纳米碳纤维(B-P/NC-600)性能卓越,循环 500 次后,在 0.1 A/g 下可达到 200 mAh/g 的稳健容量,循环 12,000 次后,在 1 A/g 下仍可达到 160 mAh/g 的持久可逆容量,显示出柔性 B-P/NC-600 同样值得称道的稳定性。此外,B-P/NC-600 还能在 60 °C 测试温度下提供 265 mAh/g 的可逆容量。更重要的是,柔性 B-P/NC-600 可用作整个电池的阳极,在 1 A/g 循环 200 次后,可提供 90 mAh/g 的容量。同时,理论计算进一步验证了硼磷共掺杂能提高氮碳材料的吸附能力。柔性 B-P/NC-600 的良好性能可归因于富氮碳纳米纤维的三维网络基质为硼磷共掺杂提供了更多的活性位点。我们的工作为通过掺杂更多杂质原子来提高钠离子电池的柔性阳极和宽工作温度铺平了道路。
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来源期刊
Chinese Chemical Letters
Chinese Chemical Letters 化学-化学综合
CiteScore
14.10
自引率
15.40%
发文量
8969
审稿时长
1.6 months
期刊介绍: Chinese Chemical Letters (CCL) (ISSN 1001-8417) was founded in July 1990. The journal publishes preliminary accounts in the whole field of chemistry, including inorganic chemistry, organic chemistry, analytical chemistry, physical chemistry, polymer chemistry, applied chemistry, etc.Chinese Chemical Letters does not accept articles previously published or scheduled to be published. To verify originality, your article may be checked by the originality detection service CrossCheck.
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