Heteroatom Si Substituent Imidazolium-Based Ionic Liquid Electrolyte Boosts the Performance of Dendrite-Free Lithium Batteries

Nan Chen; Yibiao Guan; Jinran Shen; Cui Guo; Wenjie Qu; Yuejiao Li; Feng Wu; Renjie Chen

doi:10.1021/acsami.9b01417

journal article·2019-03-27

Heteroatom Si Substituent Imidazolium-Based Ionic Liquid Electrolyte Boosts the Performance of Dendrite-Free Lithium Batteries

Nan Chen, Yibiao Guan, Jinran Shen, Cui Guo, Wenjie Qu, Yuejiao Li, Feng Wu, Renjie Chen

ACS Applied Materials & Interfaces· Volume 11· Issue 12

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Source abstract

Abstract

The high-viscosity issue of ionic liquids hinders the practical use of ionic liquid electrolytes for high-energy density batteries. Here, we demonstrate a novel heteroatom Si substituent imidazolium-based ionic liquid electrolyte, which has low viscosity and high ionic conductivity, and the heteroatom Si substituent weakens the activity of the C-2 position of imidazolium cation, prevents the formation of a highly loose lithium corrosion layer, and enables Li/LiFePO4 cycling with high coulombic efficiency (up to 99.7%) and greatly enhanced cycling stability. The electrolyte is intrinsically safe and stable with lithium metal, boosts the security of Li-metal usage, and enables dense-packing Li deposition of Li anode. This strategy of building heteroatom Si substituent ionic liquid is successful in reducing the viscosity, realizing safe and stable electrolyte for assembling a high-energy density battery.

Source: openalex_inverted_index · Quality: baseline

Research context

Energy storage Metals & alloys Materials processing

OpenAlex topics: Advanced Battery Materials and Technologies · Advancements in Battery Materials · Ionic liquids properties and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems, China Electric Power Research Institute, Beijing 100192, China

China Electric Power Research Institute, Beijing 100192, China

Funding

China Postdoctoral Science Foundation · National Natural Science Foundation of China · Major achievements Transformation Project for Central University in Beijing, and Beijing Key Research and Development Plan · the Joint Funds of the National Natural Science Foundation of China · Beijing Institute of Technology Research Fund Program for Young Scholars · the Science and Technology Project of the State Grid Corporation of China-Outsourcing project

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