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题名: Enhanced lithium and electron diffusion of LiFePO4 cathode with two-dimensional Ti3C2 MXene nanosheets
作者: Li, XC;  Qian, YH;  Liu, T;  Cao, FT;  Zang, Z;  Sun, XL;  Sun, SM;  Niu, QH;  Wu, JF
通讯作者: Wu, JF (reprint author), Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao 266042, Peoples R China.
发表日期: 2018-8-1
学科主题: Materials Science, Multidisciplinary
关键词: LI-ION BATTERIES;  2D TITANIUM CARBIDE;  1100 DEGREES-C;  ELECTROCHEMICAL PERFORMANCE;  CONDUCTIVE ADDITIVES;  ENERGY-STORAGE;  GRAPHENE;  TI3ALC2;  COMPOSITE;  CAPACITY
摘要: Novel LiFePO4/Ti3C2 composite (LFP/TC) cathodes have been prepared via a simple wet mixing method followed by a heat treatment at 400 A degrees C. Ti3C2 nanosheets bridge the LiFePO4 nanoparticles to form an integrated conductive network via the "plane-to-point" conducting mode. This conductive network acts as short pathways for the diffusion of both lithium ion and electron in the composite cathode. Thus, the electronic and ionic conductivities are simultaneously enhanced, leading to the improved electrochemical properties of LFP/TC composites. Thereinto, the LFP/TC composite with 2 wt% Ti3C2 (LFP/TC2) delivers the highest initial discharge capacity of 159 mAh g(-1) at 0.1 C as well as the best rate performance with a high reversible capacity of 86 mAh g(-1) at 5 C. Meanwhile, the LFP/TC2 composite also holds the superior capacity retention of 96% at 1 C after 100 cycles. The results demonstrate that LFP/TC composite has promising practical applications as the cathode material in the high-power lithium-ion batteries.
资助者: 100 Talents program of Chinese Academy of Sciences; National Natural Science Foundation of China [21673267]; China Postdoctoral Science Foundation
英文摘要: Novel LiFePO4/Ti3C2 composite (LFP/TC) cathodes have been prepared via a simple wet mixing method followed by a heat treatment at 400 A degrees C. Ti3C2 nanosheets bridge the LiFePO4 nanoparticles to form an integrated conductive network via the "plane-to-point" conducting mode. This conductive network acts as short pathways for the diffusion of both lithium ion and electron in the composite cathode. Thus, the electronic and ionic conductivities are simultaneously enhanced, leading to the improved electrochemical properties of LFP/TC composites. Thereinto, the LFP/TC composite with 2 wt% Ti3C2 (LFP/TC2) delivers the highest initial discharge capacity of 159 mAh g(-1) at 0.1 C as well as the best rate performance with a high reversible capacity of 86 mAh g(-1) at 5 C. Meanwhile, the LFP/TC2 composite also holds the superior capacity retention of 96% at 1 C after 100 cycles. The results demonstrate that LFP/TC composite has promising practical applications as the cathode material in the high-power lithium-ion batteries.
部门归属: [Li, Xichao;  Liu, Tao;  Cao, Fengting;  Sun, Xiaolin;  Sun, Shimei;  Niu, Quanhai;  Wu, Jianfei] Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao 266042, Peoples R China;  [Qian, Yuhai] Chinese Acad Sci, Inst Met Res, High Performance Ceram Div, Shenyang 110016, Peoples R China;  [Zang, Zhao] China Univ Petr, Coll Mech & Elect Engn, Qingdao 266580, Peoples R China
刊名: JOURNAL OF MATERIALS SCIENCE
收录类别: SCI
内容类型: 期刊论文
URI标识: http://ir.imr.ac.cn/handle/321006/79278
ISSN号: 0022-2461
语种: 英语
Appears in Collections:中国科学院金属研究所_期刊论文

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Recommended Citation:
Li, XC,Qian, YH,Liu, T,et al. Enhanced Lithium And Electron Diffusion Of Lifepo4 Cathode With Two-dimensional Ti3c2 Mxene Nanosheets[J]. Journal Of Materials Science,2018,53(15):11078-11090.

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