Space charge layer effect in rechargeable solid state lithium batteries: principle and perspective#br#

doi:10.12028/j.issn.2095-4239.2016.0031

Abstract

Abstract: The space charge layer (SCL) effects result from the requirement of thermodynamic equilibrium at the interface, which were firstly used to account for the abnormal conductivity enhancement in composite conductors. They were lateron developed to qualitatively and quantitatively explain the interfacial transport behaviors in many other systems. Particularly, the SCL effects could be utilized to control the conductivity and construct artificial conductors in nanometer-scale systems. Rechargeable solid state lithium batteries have attracted much attention, especially the SCL effects at the interfaces between the electrolyte and the electrode or inside the composite electrode. In this paper, the principle of SCL based on defect chemistry near the two-phase boundary from the thermodynamical point of view is firstly presented. The SCL effects in several typical conducting systems as well as the influence on properties are reviewed. On this basis, the SCL effects in rechargeable solid state lithium batteries reported so far are reviewed. Characterization techniques of the SCL effects are introduced. Finally, the possibility of utilizing SCL effects to improve battery performance is addressed.

Key words: space charge layer, defect chemistry, interfacial resistance, rechargeable solid state lithium battery

CHEN Cheng1, LING Shigang2, GUO Xiangxin1, LI Hong2. Space charge layer effect in rechargeable solid state lithium batteries: principle and perspective#br#[J]. Energy Storage Science and Technology, 2016, 5(5): 668-677.

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