A B,N co-doped carbon nanotube array with anchored MnO_(2) nanosheets as a flexible cathode for aqueous zinc-ion batteries  

B,N共掺杂碳纳米管阵列锚定MnO_(2)纳米片作为水系锌离子电池的柔性阴极

作　　者：YUAN Yan-bing ZHAO Zong-bin BI Hong-hui ZHANG Run-meng WANG Xu-zhen QIU Jie-shan 袁延冰;赵宗彬;毕宏晖;张润萌;王旭珍;邱介山(大连理工大学化工学院,辽宁省能源材料化工重点实验室,辽宁大连116024;大连理工大学化学学院,辽宁省能源材料化工重点实验室,辽宁大连116024;北京化工大学化学工程学院,化工资源有效利用国家重点实验室,北京100029)

机构地区：[1]State Key Lab of Fine Chemicals,Liaoning Key Lab for Energy Materials and Chemical Engineering,School of Chemical Engineering,Dalian University of Technology,Dalian 116024,China [2]School of Chemistry,Liaoning Key Lab for Energy Materials and Chemical Engineering,Dalian University of Technology,Dalian 116024,China [3]College of Chemical Engineering,State Key Laboratory of Chemical Resource Engineering,Beijing University of Chemical Technology,Beijing 100029,China

出　　处：《新型炭材料(中英文)》2025年第1期200-210,共11页New Carbon Materials

基　　金：financial support from projects funded by the National Natural Science Foundation of China(52172038,22179017);the National Key Research and Development Program of China(2022YFB4101600,2022YFB4101601)。

摘　　要：For rechargeable aqueous zinc-ion batteries(ZIBs),the design of nanocomposites comprised of electrochemically active materials and carbon materials with novel structures has great prom-ise in addressing the issue of electrical conductivity and structural stability in the electrode materials during electrochemical cycling.We report the production of a novel flexible electrode material,by anchoring MnO_(2) nanosheets on a B,N co-doped carbon nanotube ar-ray(BNCNTs)grown on carbon cloth(BNCNTs@MnO_(2)),which was fabricated by in-situ pyrolysis and hydrothermal growth.The generated BNCNTs were strongly bonded to the surface of the car-bon fibers in the carbon cloth which provides both excellent elec-tron transport and ion diffusion,and improves the stability and dur-ability of the cathode.Importantly,the BNCNTs offer more active sites for the hydrothermal growth of MnO_(2),ensuring a uniform dis-tribution.Electrochemical tests show that BNCNTs@MnO_(2) delivers a high specific capacity of 310.7 mAh g^(−1) at 0.1 A g^(−1),along with excellent rate capability and outstanding cycling stability,with a 79.7% capacity retention after 8000 cycles at 3 A g^(−1).对于可充电水系锌离子电池(AZIBs),由电化学活性材料和具有新颖结构的炭材料组成的纳米复合材料的分级设计在解决电化学循环过程中电极材料的电导率和结构稳定性方面具有巨大的应用前景。我们报道了一种新型柔性电极材料,通过原位热解和水热生长将MnO_(2)纳米片锚定在B,N共掺杂碳纳米管阵列(BNCNTs)的炭布上(BNCNTs@MnO_(2))。生成的BNCNTs牢固地结合在炭布内的炭纤维表面,这有利于电子传输和离子扩散,提高了正极的稳定性和耐久性。重要的是,BNCNTs为MnO_(2)的水热生长提供了更多的活性位点,确保了其均匀分布。电化学测试表明,BNCNTs@MnO_(2)在0.1 Ag^(-1)时可提供310.7 mAh g^(-1)的高比容量,同时具有出色的倍率性能和优异的循环稳定性,在3 A g^(-1)下经8000次循环后容量保持率为79.7%。

关 键 词：B N co-doped carbon nanotube Manganese dioxide Flexible electrode Aqueous zinc-ion batteries 

分 类 号：TQ152[化学工程—电化学工业]