3D Current Collectors for Lithium‐Ion Batteries: A Topical Review,Small Methods

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3D Current Collectors for Lithium‐Ion Batteries: A Topical Review
Small Methods ( IF 10.7 ) Pub Date : 2018-06-10 , DOI: 10.1002/smtd.201800056
Yuan Yue ₁ , Hong Liang _{1,

2}

Affiliation

Current collectors play important roles in enhancing the electrochemical performance of lithium‐ion batteries. Currently used collectors are mostly made of aluminum or copper foils through slurry casting with binders that have not reached optimal capacity. Furthermore, extended cycles of charge and discharge induce detachment of the cast layer, resulting in damage to the structural integrity. In order to better understand the principles of the performance of and thus optimize current collectors, a critical review is conducted focusing on their structures. Through analysis of data collected from more than 50 publications, the capacity and retention as a function of current density and charge cycle, respectively, are identified. Two new terms, which are characteristic of 3D current collectors, are defined as Regime I and Regime II in the corresponding plots. Regime I refers to the maximum reversible capacity and Regime II to the maximum capacitor retention. The greater the values of those values, the greater the enhancement of capacity and retention. Using these concepts, it is predicted that carbonaceous and fibrous 3D hierarchical current collectors would be beneficial as battery collectors. The results and approach provide perspective for future design and advancement of electrochemical energy‐storage devices.

中文翻译：

锂离子电池的3D集电器：专题回顾

集电器在增强锂离子电池的电化学性能方面起着重要作用。当前使用的收集器主要由铝或铜箔通过未达到最佳容量的粘合剂通过浆料浇铸制成。此外，延长的充电和放电循环会引起浇铸层的分离，从而导致结构完整性的损坏。为了更好地理解集电器的性能原理并由此优化集电器，我们针对其结构进行了严格的审查。通过对从50多个出版物中收集的数据进行分析，分别确定了容量和保留率与电流密度和充电周期的关系。3D集电器的两个新术语，在相应的图中被定义为区域I和区域II。方案一是指最大可逆容量，方案二是指最大的电容器保持能力。这些值的值越大，容量和保留能力的增强就越大。使用这些概念，可以预测，碳质和纤维质3D分层集电器将有利于用作电池集电器。结果和方法为电化学储能装置的未来设计和发展提供了前景。据预测，碳质和纤维质3D分层集电器将作为电池集电器是有益的。结果和方法为电化学储能装置的未来设计和发展提供了前景。据预测，碳质和纤维质3D分层集电器将作为电池集电器是有益的。结果和方法为电化学储能装置的未来设计和发展提供了前景。

更新日期：2018-06-10

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