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首页> 外文期刊>Asian Journal of Engineering, Sciences & Technology >Graphene to Supplement Conventional Electrode Materials in Lithium-Ion Batteries: Opportunities and Challenges
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Graphene to Supplement Conventional Electrode Materials in Lithium-Ion Batteries: Opportunities and Challenges

机译：石墨烯补充锂离子电池中的常规电极材料：机遇与挑战

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摘要

Graphene is extracted from graphite and possesses some the ideal characteristics of very light weight, high conductivity, and chemical stability. The conventional materials used as LIB electrodes fail to meet the increasing demand of more efficient, faster, and lighter charge storing cells. This magnifies the role of graphene to be used as supplementary material for achieving higher levels of battery charge capacity, reduced charge losses during discharge, and greater cyclic stability over a longer duration. The researcher has examined graphene as a hybrid or supplementary element with lithium iron phosphate (LiFePO4), manganese oxide, (MnO2), and cobalt oxide (Co3O4), which are currently used as cathode materials, and with lithium titanium oxide (Li4Ti5O12) and silicon (Si), which are presently used as anode materials. Graphene as supplementary cathode material exhibited benefits of greater charge capacitance and cyclic stability, while at the anode it exhibited benefits of reduced discharge losses and reduced volumetric expansion. The integration of graphene at anode was met with fewer challenges than at the cathode as anode act as active charge carrier during the charging process and carbon-family elements serve as good charge retainers.
机译：石墨烯是从石墨中提取的，具有重量轻，导电率高和化学稳定性好等一些理想特性。用作LIB电极的常规材料无法满足对更高效，更快和更轻的电荷存储单元不断增长的需求。这放大了石墨烯用作补充材料的作用，以实现更高级别的电池充电容量，减少放电过程中的电荷损失以及在更长的时间内实现更高的循环稳定性。研究人员研究了石墨烯作为混合或补充元素与目前用作正极材料的磷酸铁锂（LiFePO4），氧化锰（MnO2）和氧化钴（Co3O4）以及锂钛氧化物（Li4Ti5O12）和硅（Si），目前用作阳极材料。石墨烯作为辅助阴极材料具有更大的电荷电容和循环稳定性的优点，而在阳极方面具有减少放电损耗和减小体积膨胀的优点。石墨烯在阳极的集成比在阴极面临的挑战要少，因为阳极在充电过程中充当了活性电荷载体，而碳族元素则充当了良好的电荷保持剂。

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