Walnut‐Like Multicore–Shell MnO Encapsulated Nitrogen‐Rich Carbon Nanocapsules as Anode Material for Long‐Cycling and Soft‐Packed Lithium‐Ion Batteries,Advanced Functional Materials

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Walnut‐Like Multicore–Shell MnO Encapsulated Nitrogen‐Rich Carbon Nanocapsules as Anode Material for Long‐Cycling and Soft‐Packed Lithium‐Ion Batteries
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2018-03-12 , DOI: 10.1002/adfm.201800003
Guoyin Zhu ₁ , Lei Wang ₁ , Huinan Lin ₁ , Liaobo Ma ₁ , Peiyang Zhao ₁ , Yi Hu ₁ , Tao Chen ₁ , Renpeng Chen ₁ , Yanrong Wang ₁ , Zuoxiu Tie ₁ , Jie Liu _{1,

2} , Zhong Jin ₁

Affiliation

Metal oxide‐based nanomaterials are widely studied because of their high‐energy densities as anode materials in lithium‐ion batteries. However, the fast capacity degradation resulting from the large volume expansion upon lithiation hinders their practical application. In this work, the preparation of walnut‐like multicore–shell MnO encapsulated nitrogen‐rich carbon nanocapsules (MnO@NC) is reported via a facile and eco‐friendly process for long‐cycling Li‐ion batteries. In this hybrid structure, MnO nanoparticles are uniformly dispersed inside carbon nanoshells, which can simultaneously act as a conductive framework and also a protective buffer layer to restrain the volume variation. The MnO@NC nanocapsules show remarkable electrochemical performances for lithium‐ion batteries, exhibiting high reversible capability (762 mAh g⁻¹ at 100 mA g⁻¹) and stable cycling life (624 mAh g⁻¹ after 1000 cycles at 1000 mA g⁻¹). In addition, the soft‐packed full batteries based on MnO@NC nanocapsules anodes and commercial LiFePO₄ cathodes present good flexibility and cycling stability.

中文翻译：

像核桃一样的多核壳型MnO封装的富氮碳纳米胶囊作为长循环和软包装锂离子电池的负极材料

基于金属氧化物的纳米材料作为锂离子电池的负极材料具有很高的能量密度，因此得到了广泛的研究。然而，由于锂化时大体积膨胀而导致的快速容量降低阻碍了它们的实际应用。在这项工作中，据报道，通过一种简便，环保的长寿命锂离子电池工艺，制备了核桃状多核壳型MnO封装的富氮碳纳米胶囊（MnO @ NC）。在这种混合结构中，MnO纳米颗粒均匀地分散在碳纳米壳内部，可以同时充当导电骨架和保护性缓冲层，以限制体积变化。MnO @ NC纳米胶囊对锂离子电池表现出卓越的电化学性能，具有高可逆性（762 mAh g^-1在100mA克^-1）和稳定的循环寿命（624毫安克^-1之后以1000mA克1000个周期^-1）。此外，基于MnO @ NC纳米胶囊阳极和商用LiFePO ₄阴极的软包装全电池具有良好的柔韧性和循环稳定性。

更新日期：2018-03-12

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