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首页> 外文期刊>Journal of power sources >Recycling of spent ion-lithium batteries as cobalt hydroxide, and cobalt oxide films formed under a conductive glass substrate, and their electrochemical properties
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Recycling of spent ion-lithium batteries as cobalt hydroxide, and cobalt oxide films formed under a conductive glass substrate, and their electrochemical properties

机译：废旧的离子锂电池以氢氧化钴的形式回收，以及在导电玻璃基板下形成的氧化钴膜及其电化学性能

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摘要

In this work, Co(OH)_2 and Co_3O_4 films have been obtained using a solution to leach the cathodes of spent Li-ion batteries. The Co(OH)_2 is electrodeposited onto conductive glass by the application of -0.85 V, with a charge density of 20 C cm~(-2), and its efficiency is found to be 66.67%. The Co_3O_4 film is obtained by heat treatment of the Co(OH)_2 film at 450 ℃ for 3 h, in an air atmosphere, with a conversion efficiency of 64.29%. The cyclic voltammetry of Co(OH)_2, in KOH 1.0 mol L~(-1) shows: three anodic peaks in the first cycle associated with the oxidation of Co(OH)_2 to Co_3O_4, the conversion of Co_3O_4 into CoOOH, and the formation of CoOOH to CoO_2 and the oxidation of water. The absence of cathodic peaks shows that oxidation from Co(OH)_2 to CoO_2 is an irreversible process. For the Co_3O_4 electrode, this verifies the existence of a redox pair associated with reversible oxidation of the Co_3O_4 to CoO_2. The Co_3O_4 obtains a charge efficiency of 77% for the first 10 cycles (1.0 mV s~(-1)) and a specific capacitance of 31.2 F g~(-1) (1.0 mV s~(-1)) and 10.5 F g~(-1) (10 mV s~(-1)). Co_3O_4 films have promising applications as pseudocapacitors.
机译：在这项工作中，已使用溶液浸提废锂离子电池的阴极获得了Co（OH）_2和Co_3O_4膜。通过施加-0.85 V，将Co（OH）_2电沉积在导电玻璃上，电荷密度为20 C cm〜（-2），发现其效率为66.67％。 Co_3O_4薄膜是通过在空气气氛中于450℃下将Co（OH）_2薄膜热处理3小时而获得的，转化效率为64.29％。 Co（OH）_2在1.0 mol L〜（-1）的KOH中的循环伏安法显示：第一个循环中的三个阳极峰与Co（OH）_2氧化为Co_3O_4，Co_3O_4转化为CoOOH以及CoOOH生成CoO_2以及水的氧化。阴极峰的不存在表明从Co（OH）_2到CoO_2的氧化是不可逆的过程。对于Co_3O_4电极，这验证了与Co_3O_4可逆氧化为CoO_2相关的氧化还原对的存在。 Co_3O_4在前10个周期（1.0 mV s〜（-1））中的充电效率为77％，比电容为31.2 F g〜（-1）（1.0 mV s〜（-1））和10.5 F g〜（-1）（10 mV s〜（-1））。 Co_3O_4薄膜作为伪电容器具有广阔的应用前景。

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  • 来源
    《Journal of power sources》 |2014年第10期|158-163|共6页
  • 作者

    E.M.S. Barbieri; E.P.C. Lima; S.J. Cantarino; M.F.F. Lelis; M.B.J.G. Freitas;

  • 作者单位

    Federal University of Espirito Santo, Chemistry Department, Laboratory of Electrochemistry and Electroanalytics, Av. Fernando Ferrari, 514, Goiabeiras, Vitoria, Espirito Santo 29075-910, Brazil;

    Federal University of Espirito Santo, Chemistry Department, Laboratory of Electrochemistry and Electroanalytics, Av. Fernando Ferrari, 514, Goiabeiras, Vitoria, Espirito Santo 29075-910, Brazil;

    Federal University of Espirito Santo, Chemistry Department, Laboratory of Electrochemistry and Electroanalytics, Av. Fernando Ferrari, 514, Goiabeiras, Vitoria, Espirito Santo 29075-910, Brazil;

    Federal University of Espirito Santo, Chemistry Department, Laboratory of Electrochemistry and Electroanalytics, Av. Fernando Ferrari, 514, Goiabeiras, Vitoria, Espirito Santo 29075-910, Brazil;

    Federal University of Espirito Santo, Chemistry Department, Laboratory of Electrochemistry and Electroanalytics, Av. Fernando Ferrari, 514, Goiabeiras, Vitoria, Espirito Santo 29075-910, Brazil;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Recycling; Ion-lithium batteries; Cobalt hydroxide; Cobalt oxide; Pseudocapacitor;

    机译：回收;离子锂电池;氢氧化钴;氧化钴伪电容器;

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