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首页> 外文期刊>ACS applied materials & interfaces >LiMn0.8Fe0.2PO4/Carbon Nanospheres@Graphene Nanoribbons Prepared by the Biomineralization Process as the Cathode for Lithium-Ion Batteries
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LiMn0.8Fe0.2PO4/Carbon Nanospheres@Graphene Nanoribbons Prepared by the Biomineralization Process as the Cathode for Lithium-Ion Batteries

机译：LIMN0.8FE0.2PO4 /碳纳米球@石墨烯纳米波纹由生物矿化过程制备为锂离子电池的阴极

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摘要

Biomineralization technology is a feasible and promising route to fabricate phosphate cathode materials with hierarchical nanostructure for high-performance lithium-ion batteries (LIBs). In this work, to improve the electrochemical performance of LiMn0.8Fe0.2PO4 (LMFP), hierarchical LMFP/carbon nanospheres are wrapped in situ with N-doped graphene nanoribbons (GNRs) via biomineralization by using yeast cells as the nucleating agent, self-assembly template, and carbon source. Such LMFP nanospheres are assembled by more fine nanocrystals with an average size of 18.3 nm. Moreover, the preferential crystal orientation along the [010] direction and certain antisite lattice defects can be identified in LMFP nanocrystals, which promote rapid diffusion of Li ions and generate more active sites for the electrochemical reaction. Moreover, such N-doped GNR networks, wrapped between LMFP/carbon nanospheres, are beneficial to the fast mobility of electrons and good penetration of the electrolyte. As expected, the as-prepared LMFP/carbon multicomposite presents the outstanding electrochemical performance, including the large initial discharge capacity of 168.8 mA h g(-1), good rate capability, and excellent long-term cycling stability over 2000 cycles. Therefore, the biomineralization method is demonstrated here to be effective to manipulate the microstructure of multicomponent phosphate cathode materials based on the requirement of capacity, rate capability, and cycle stability for LIBs.
机译：生物蛋白化技术是一种可行和有希望的途径，用于制造具有用于高性能锂离子电池（LIBS）的等级纳米结构的磷酸盐阴极材料。在这项工作中，为了提高LiMn0.8Fe0.2PO4（LMFP）的电化学性能，通过使用酵母细胞作为成核剂，通过生物抗体将等级LMFP /碳纳米球用生物抗体以生物抗体缠在原位用生物碳化剂。装配模板和碳源。这种LMFP纳米球由平均尺寸为18.3nm的更精细的纳米晶体组装。此外，可以在LMFP纳米晶体中鉴定沿[010]方向和某些反砂晶片缺陷的优先​​晶体取向，这促进了Li离子的快速扩散并产生了用于电化学反应的更多活性位点。此外，在LMFP /碳纳米球之间包裹的这种N掺杂的GNR网络有利于电子的快速迁移和电解质的良好渗透。如所预期的，按照制备的LMFP / Carbon Multicop二选呈现出优异的电化学性能，包括168.8 mA H（-1），良好的速率能力和优异的长期循环稳定性的初始初始放电容量。因此，这里证明了生物丙原化方法以根据容量，速率能力和Libs的循环稳定性来操纵多组分磷酸盐阴极材料的微观结构。

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