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实验室关于促使锂离子电池性能飞跃的最新成果发表在Chemical Engineering Science
2024-05-21 21:55  

近日,刘燕萍同学和陈梁老师在锂离子电池领域的研究取得了突破性进展。他们采用了先进的g–C3N4辅助热解策略,成功合成了一种新型的Mn2O3@NC-M复合材料,用作锂离子电池的阳极材料。该研究打破了传统石墨阳极的局限性,因其具有超细的Mn2O3纳米颗粒、大比表面积、丰富的介孔结构和高掺氮量等特点,从而显著增强了循环稳定性和倍率性能。研究团队利用g–C3N4作为分散剂、造孔剂和掺杂剂,实现了Mn2O3@NC-M的均匀分散和良好的孔隙结构。此外,适量的锰源投料也对合成效果起到了关键作用。这一研究为未来高性能锂离子电池的发展带来了新的希望。

The construction of advanced transition metal oxide (TMO)/carbon anodes to substitute graphite is always being an enormous challenge for the evolution of lithium–ion batteries (LIBs). Herein, a g–C3N4–assisted pyrolysis strategy is exploited to produce Mn2O3 nanoparticles embedded into N–doped carbon (Mn2O3@NC) hybrids. The results confirm that g–C3N4 plays three critical roles (dispersing agent, pore–forming agent and doping agent) in producing Mn2O3@NC hybrids. In the meantime, it is verified that the feed of Mn source greatly affects the synthesis of Mn2O3@NC hybrids. As a consequence, the resultant Mn2O3@NC–M (M means medium loading of Mn source) reaches a balanced proportion of Mn2O3 and NC, and contemporaneously displays a series of intriguing features, including ultrafine Mn2O3 nanoparticles, large specific surface area, rich mesopores and much high N doping amount. Benefitting from these advantages, the obtained Mn2O3@NC–M shows much enhanced cycling stability and rate performance when engaged as an battery anode.

论文题目:g–C3N4–assisted synthesis of ultrafine Mn2O3 nanoparticles embedded into N–doped carbon for advanced lithium–ion battery anode.

论文作者:Liang Chen, Yanping Liu, Lanyun Yang, Chenxi Xu, Wei Wang, Gangyong Li, Yucan Zhu, Minjie Zhou, Zhaohui Hou. 

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