三维连续结构Li4Ti5O12/石墨烯纳米复合材料：制备和其锂离子电池超长循环性能

引用本文: 林子夏, 王刚, 郑明波, 赵斌, 李念武, 濮林, 施毅. 三维连续结构Li₄Ti₅O₁₂/石墨烯纳米复合材料：制备和其锂离子电池超长循环性能[J]. 无机化学学报, 2013, 29(7): 1465-1470. doi: 10.3969/j.issn.1001-4861.2013.00.232 shu

Citation: LIN Zi-Xia, WANG Gang, ZHENG Ming-Bo, ZHAO Bin, LI Nian-Wu, PU Lin, SHI Yi. Ultra-Long-Term Cyclability of Li₄Ti₅O₁₂/Graphene Nanocomposite Anode Material with Three-Dimensional Continuous Structure for Lithium-Ion Batteries[J]. Chinese Journal of Inorganic Chemistry, 2013, 29(7): 1465-1470. doi: 10.3969/j.issn.1001-4861.2013.00.232 shu

三维连续结构Li₄Ti₅O₁₂/石墨烯纳米复合材料：制备和其锂离子电池超长循环性能

基金项目:
国家重点基础研究发展计划(No.2013CB932900,2011CB922100) (No.2013CB932900,2011CB922100)

国家自然科学基金(No.51202106,60990314,61106089) (No.51202106,60990314,61106089)

江苏省自然科学基金(No.KB2011011)资助项目。 (No.KB2011011)

摘要: 利用具有三维连续纳米孔结构的热剥离石墨烯为骨架制备Li₄Ti₅O₁₂/石墨烯纳米复合材料。通过乙醇挥发法在热剥离石墨烯的纳米孔道内引入前驱物,进一步高温热处理,在热剥离石墨烯的孔道内原位形成Li₄Ti₅O₁₂纳米粒子。利用复合材料作为锂离子电池电极材料。电化学反应过程中,热剥离石墨烯的三维连续结构确保了Li₄Ti₅O₁₂纳米粒子与石墨烯在长循环过程中的有效接触。因此,复合材料表现出优异的循环稳定性。在5C下,5 000次循环后,其容量保持率高达94%。

关键词:

Li₄Ti₅O₁₂;石墨烯;纳米复合材料;负极材料;锂离子电池

English

Ultra-Long-Term Cyclability of Li₄Ti₅O₁₂/Graphene Nanocomposite Anode Material with Three-Dimensional Continuous Structure for Lithium-Ion Batteries

1.
Nanjing National Laboratory of Microstructures, School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China
Received Date: 28 January 2013
Fund Project:
国家重点基础研究发展计划(No.2013CB932900,2011CB922100)

国家自然科学基金(No.51202106,60990314,61106089)

江苏省自然科学基金(No.KB2011011)资助项目。

Abstract: Li₄Ti₅O₁₂/graphene nanocomposite was synthesized using thermally exfoliated graphene with a three-dimensional continuous nanoporous structure as the matrix. The precursors were introduced into the interior nanopores of thermally exfoliated graphene by the ethanol evaporation method. After heat treatment, Li₄Ti₅O₁₂ nanoparticles were formed in situ in the nanopores of thermally exfoliated graphene. As an anode material for lithium-ion batteries, the three-dimensional continuous structure of thermally exfoliated graphene ensures sufficient contact between Li₄Ti₅O₁₂ and graphene during the long cycling. Consequently, the nanocomposite shows superior cyclic stability. The capacity retention is still as high as 94% after 5 000 cycles at 5C.

Key words:

Li₄Ti₅O₁₂;graphene;nanocomposite;anode;lithium-ion battery

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

三维连续结构Li₄Ti₅O₁₂/石墨烯纳米复合材料：制备和其锂离子电池超长循环性能

English

Ultra-Long-Term Cyclability of Li₄Ti₅O₁₂/Graphene Nanocomposite Anode Material with Three-Dimensional Continuous Structure for Lithium-Ion Batteries

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