In Situ Synthesis of Mn3O4 Nanoparticles on Hollow Carbon Nanofiber as High-Performance Lithium-Ion Battery Anode
In Situ Synthesis of Mn3O4 Nanoparticles on Hollow Carbon Nanofiber as High-Performance Lithium-Ion Battery Anode
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中空碳纳米纤维上原位合成Mn3O4纳米粒子作为高性能锂离子电池负极
DOI：
10.1002/chem.201801196
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Li Liping
中科院分区：
文献类型：
--
作者：
Zhang Dan;Li Guangshe;Fan Jianming;Li Baoyun;Li Liping
Mn 3 O 4在锂离子电池中的实际应用受到容量衰减快和倍率性能差的极大阻碍，这是由于显著的体积变化和低电导率。认为纳米Mn 3 O 4的合成与碳质基体的结合将导致更好的电化学性能。本文报道了一种在空心碳纳米管（HCF/Mn 3 O 4）上原位生长Mn 3 O 4纳米粒子的简便方法。小尺寸的Mn 3 O 4颗粒与HCF结合可以显著减轻体积变化和电导率; HCF与Mn 3 O 4之间的强化学相互作用将提高MnO转化为Mn 3 O 4反应的可逆性，加速电荷转移。这些特性赋予HCF/Mn 3 O 4复合材料上级的循环稳定性和倍率性能，如果用作锂离子电池的阳极。该复合材料在200 mA g−1下循环100次后的放电容量为835mA h g− 1，在1000 mA g−1下循环240次后的放电容量为652 mA h g− 1。 即使在2000 mA g−1时，它仍显示出528 mA h g−1的高容量。 HCF/Mn 3 O 4复合材料的简单合成方法和优异的电化学性能使其成为锂离子电池负极材料的潜在候选者。
The practical applications of Mn3O4in lithium‐ion batteries are greatly hindered by fast capacity decay and poor rate performance as a result of significant volume changes and low electrical conductivity. It is believed that the synthesis of nanoscale Mn3O4combined with carbonaceous matrix will lead to a better electrochemical performance. Herein, a convenient route for the synthesis of Mn3O4nanoparticles grown in situ on hollow carbon nanofiber (denoted as HCF/Mn3O4) is reported. The small size of Mn3O4particles combined with HCF can significantly alleviate volume changes and electrical conductivity; the strong chemical interactions between HCF and Mn3O4would improve the reversibility of the conversion reaction for MnO into Mn3O4and accelerate charge transfer. These features endow the HCF/Mn3O4composite with superior cycling stability and rate performance if used as the anode for lithium‐ion batteries. The composite delivers a high discharge capacity of 835 mA h g−1after 100 cycles at 200 mA g−1, and 652 mA h g−1after 240 cycles at 1000 mA g−1. Even at 2000 mA g−1, it still shows a high capacity of 528 mA h g−1. The facile synthetic method and outstanding electrochemical performance of the as‐prepared HCF/Mn3O4composite make it a promising candidate for a potential anode material for lithium‐ion batteries.