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首页> 外文期刊>Advanced Functional Materials >Thermal Reductive Perforation of Graphene Cathode for High-Performance Aluminum-Ion Batteries
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Thermal Reductive Perforation of Graphene Cathode for High-Performance Aluminum-Ion Batteries

机译：高性能铝离子电池石墨烯阴极的热还原穿孔

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摘要

Controlling the structure of graphene-based materials with improved ion intercalation and diffusivity is crucial for their applications, such as in aluminum-ion batteries (AIBs). Due to the large size of AlCl4- ions, graphene-based cathodes have specific capacities of approximate to 60 to 148 mAh g(-1), limiting the development of AIBs. A thermal reductive perforation (TRP) strategy is presented, which converts three-layer graphene nanosheets to surface-perforated graphene materials under mild temperature (400 degrees C). The thermal decomposition of block copolymers used in the TRP process generates active radicals to deplete oxygen and create graphene fragments. The resultant material has a three-layer feature, in-plane nanopores, 50% expanded interlayer spacing, and a low oxygen content comparable to graphene annealed at a high temperature of approximate to 3000 degrees C. When applied as an AIB cathode, it delivers a reversible capacity of 197 mAh g(-1) at a current density of 2 A g(-1) and reaches 92.5% of the theoretical capacity predicted by density-functional theory simulations.
机译：控制具有改进的离子插入和扩散性的石墨烯基材料的结构对于它们的应用至关重要，例如铝离子电池（AIB）。由于尺寸的ALCL4 - 离子，基于石墨烯的阴极具有近似为60至148mAhg（-1）的特定能力，限制了AIB的发育。提出了热还原穿孔（TRP）策略，其在温和的温度下将三层石墨烯纳米片转化为表面穿孔的石墨烯材料（400℃）。在TRP过程中使用的嵌段共聚物的热分解产生有源基团以消耗氧气并产生石墨烯片段。所得材料具有三层特征，面内纳米孔，＆ 50％膨胀的层间间距，与石墨烯相当的低氧含量在近似为3000℃的高温下退火。当施加为AIB阴极时，它以2Ag（-1）的电流密度提供197mAhg（-1）的可逆容量，达到密度函数理论模拟预测的理论能力的92.5％。

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  • 来源
    《Advanced Functional Materials》 |2021年第17期|2010569.1-2010569.9|共9页
  • 作者

    Kong Yueqi; Tang Cheng; Huang Xiaodan; Nanjundan Ashok Kumar; Zou Jin; Du Aijun; Yu Chengzhong;

  • 作者单位

    Univ Queensland Australian Inst Bioengn & Nanotechnol Brisbane Qld 4072 Australia;

    Queensland Univ Technol Sch Chem & Phys Ctr Mat Sci Gardens Point Campus Brisbane Qld 4000 Australia;

    Univ Queensland Australian Inst Bioengn & Nanotechnol Brisbane Qld 4072 Australia;

    Univ Queensland Australian Inst Bioengn & Nanotechnol Brisbane Qld 4072 Australia;

    Univ Queensland Sch Mech & Min Engn Brisbane Qld 4072 Australia|Univ Queensland Ctr Microscopy & Microanal Brisbane Qld 4072 Australia;

    Queensland Univ Technol Sch Chem & Phys Ctr Mat Sci Gardens Point Campus Brisbane Qld 4000 Australia;

    Univ Queensland Australian Inst Bioengn & Nanotechnol Brisbane Qld 4072 Australia|East China Normal Univ Sch Chem & Mol Engn Shanghai 200241 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    aluminum#8208; ion batteries; cathodes; graphene; nanoporous materials;

    机译：铝＆＃8208;离子电池;阴极;石墨烯;纳米多孔材料;

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