High lithium anodic performance of flower-like carbon nanoflakes derived from MOF based on double ligands

High lithium anodic performance of flower-like carbon nanoflakes derived from MOF based on double ligands
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基于双配体的 MOF 花状碳纳米片的高锂阳极性能

DOI:
10.1016/j.jallcom.2019.07.160
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发表时间:
2019-10
影响因子:
6.2
通讯作者:
Lang Junwei
Lang Junwei
中科院分区:
材料科学2区
文献类型:
--
作者:
Jing Xin;Zhang Xu;Wang Youcheng;Wang Huanlei;Sun Mingliang;Wang Wei;Lang Junwei

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碳基负极材料具有独特的结构、高导电性、高储锂性能和优异的循环稳定性,是锂离子电池中传统石墨负极材料的理想替代品。在这里,我们报告了一种具有分级结构的花状碳材料,它是通过碳化的花状锌基金属有机框架(MOF)。在溶剂热条件下,使用两个配体构建二维层状MOF网络前体,即[Zn(BDC)(MelM)·(DMF)](BDC =苯二甲酸,MelM = 2-甲基咪唑)。作为LIB的负极材料,这些碳纳米片表现出卓越的电化学性能(容量、循环性能和倍率性能);在100 mA g−1的电流密度下,200次循环后仍保持902.5 mAh g− 1的容量。这是由于碳纳米片的独特形貌有利于电解液的渗透和锂离子的传输。
Carbon-based anode materials with unique structure, high electrical conductivity, high Li storage performance and excellent cycling stability are promising alternatives to traditional graphite anode materials in lithium-ion batteries (LIBs). Here we report a flower-like carbon material with hierarchical structure that is prepared by carbonization of a flower-like Zn-based metal-organic framework (MOF). The 2D layered MOF network precursor, namely [Zn(BDC)(MelM)·(DMF)] (BDC = benzene dicarboxylic acid, MelM = 2-Methylimidazole), is constructed using two ligands under solvothermal conditions. As an anode material for LIBs, these carbon nanoflakes exhibit remarkable electrochemical performance (capacity, cyclability, and rate capability); the capacity of 902.5 mAh g−1was retained after 200 cycles at a current density of 100 mA g−1. The remarkable performance results from the unique morphology of carbon nanoflakes which is beneficial for infiltration of electrolyte and the transportation of Li ions.
用于高性能锂离子电池的氮掺杂中空碳纳米球
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