Research Progress towards Understanding the Unique Interfaces between Concentrated Electrolytes and Electrodes for Energy Storage Applications.
Research Progress towards Understanding the Unique Interfaces between Concentrated Electrolytes and Electrodes for Energy Storage Applications.
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研究进展，了解用于储能应用的浓缩电解质和电极之间的独特接口。
DOI：
10.1002/advs.201700032
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发表时间：
2017-08
期刊：
影响因子：
--
通讯作者：
Xiao J
中科院分区：
文献类型：
--
作者：
Zheng J;Lochala JA;Kwok A;Deng ZD;Xiao J
电解液是所有电化学能量存储和转换装置中不可缺少的组成部分，电池就是一个典型的例子。虽然大多数研究工作都是在材料方面进行的，但由于盐和溶剂在低电位下的分解，更不用说它们与电极材料的复杂相互作用，电解质的进展缓慢。大块电解质的一般性质，如离子电导率、粘度和稳定性都会影响电池的性能。然而，对于阴极、阳极和电解质都经过优化的特定电化学电池来说，决定系统中离子流动速率的是固体电极和液体电解质之间的界面，通常称为固体电解质界面（SEI）。根据之前的优化经验，常用的电解液在1-1.2 m范围内，没有充分识别高浓度区域。近年来，由于在含有浓电解质的细胞中有许多有趣的发现，浓电解质（>1.0 m）受到了广泛关注。浓缩电解质衍生的SEI层的形成机制和性质可能与传统SEI层的形成机制和性质根本不同，从而实现使用常规电解质无法实现的不寻常功能。本文综述了高浓度电解质在不同电池化学领域的研究进展。讨论了实验观察到的现象及其潜在的基本机制。提出了新的见解和观点，以激发更多革命性的解决方案来解决界面挑战。
The electrolyte is an indispensable component in all electrochemical energy storage and conversion devices with batteries being a prime example. While most research efforts have been pursued on the materials side, the progress for the electrolyte is slow due to the decomposition of salts and solvents at low potentials, not to mention their complicated interactions with the electrode materials. The general properties of bulk electrolytes such as ionic conductivity, viscosity, and stability all affect the cell performance. However, for a specific electrochemical cell in which the cathode, anode, and electrolyte are optimized, it is the interface between the solid electrode and the liquid electrolyte, generally referred to as the solid electrolyte interphase (SEI), that dictates the rate of ion flow in the system. The commonly used electrolyte is within the range of 1–1.2 m based on the prior optimization experience, leaving the high concentration region insufficiently recognized. Recently, electrolytes with increased concentration (>1.0 m) have received intensive attention due to quite a few interesting discoveries in cells containing concentrated electrolytes. The formation mechanism and the nature of the SEI layers derived from concentrated electrolytes could be fundamentally distinct from those of the traditional SEI and thus enable unusual functions that cannot be realized using regular electrolytes. In this article, we provide an overview on the recent progress of high concentration electrolytes in different battery chemistries. The experimentally observed phenomena and their underlying fundamental mechanisms are discussed. New insights and perspectives are proposed to inspire more revolutionary solutions to address the interfacial challenges.
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影响因子：
9.2
作者：
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