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首页> 外文期刊>Advanced energy materials >Ultrahigh-Capacity and Fire-Resistant LiFePO_4-Based Composite Cathodes for Advanced Lithium-Ion Batteries
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Ultrahigh-Capacity and Fire-Resistant LiFePO_4-Based Composite Cathodes for Advanced Lithium-Ion Batteries

机译：超高容量和耐火的LiFePO_4基复合正极，用于高级锂离子电池

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摘要

The growing demand for advanced energy storage devices with high energy density and high safety has continuously driven the technical upgrades of cell architectures as well as electroactive materials. Designing thick electrodes with more electroactive materials is a promising strategy to improve the energy density of lithium-ion batteries (LIBs) without alternating the underlying chemistry. However, the progress toward thick, high areal capacity electrodes is severely limited by the sluggish electronic/ionic transport and easy deformability of conventional electrodes. A self-supported ultrahigh-capacity and fire-resistant LiFePO4 (UCFR-LFP)-based nanocomposite cathode is demonstrated here. Benefiting from the structural and chemical uniqueness, the UCFR-LFP electrodes demonstrate exceptional improvements in electrochemical performance and mass loading of active materials, and thermal stability. Notably, an ultrathick UCFR-LFP electrode (1.35 mm) with remarkably high mass loading of active materials (108 mg cm(-2)) and areal capacity (16.4 mAh cm(-2)) is successfully achieved. Moreover, the 1D inorganic binder-like ultralong hydroxyapatite nanowires (HAP NWs) enable the UCFR-LFP electrode with excellent thermal stability (structural integrity up to 1000 degrees C and electrochemical activity up to 750 degrees C), fire-resistance, and wide-temperature operability. Such a unique UCFR-LFP electrode offers a promising solution for next-generation LIBs with high energy density, high safety, and wide operating-temperature window.
机译：对具有高能量密度和高安全性的先进储能设备的不断增长的需求，不断推动着电池结构以及电活性材料的技术升级。设计具有更多电活性材料的厚电极是一种有前途的策略，可以提高锂离子电池（LIB）的能量密度，而无需改变基础化学性质。然而，常规电极的电子/离子迁移缓慢和易变形性严重限制了向厚的，高面积容量的电极的发展。本文展示了一种自支撑的超高容量和耐火的LiFePO4（UCFR-LFP）基纳米复合阴极。受益于结构和化学的独特性，UCFR-LFP电极在电化学性能和活性材料的质量负载以及热稳定性方面显示出卓越的改进。值得注意的是，成功实现了超厚UCFR-LFP电极（1.35毫米），具有极高的活性物质质量负载（108毫克厘米（-2））和面容量（16.4毫安厘米（-2））。此外，一维无机粘结剂状超长羟基磷灰石纳米线（HAP NWs）使UCFR-LFP电极具有出色的热稳定性（高达1000摄氏度的结构完整性和高达750摄氏度的电化学活性），耐火性和宽广的温度可操作性。这种独特的UCFR-LFP电极为具有高能量密度，高安全性和宽工作温度范围的下一代LIB提供了有希望的解决方案。

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  • 来源
    《Advanced energy materials》 |2019年第10期|1802930.1-1802930.11|共11页
  • 作者

    Li Heng; Peng Long; Wu Dabei; Wu Jin; Zhu Ying-Jie; Hu Xianluo;

  • 作者单位

    Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China|Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Hubei, Peoples R China|Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Hubei, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Hubei, Peoples R China;

    Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China;

    Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China|Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Hubei, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    cathodes; fire resistance; lithium-ion batteries; self-assembly; ultrahigh capacity;

    机译：阴极;耐火性;锂离子电池;自组装;超高容量;

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