Design of Localized High-Concentration Electrolytes via Donor Number

Juner Chen; Han Zhang; Mingming Fang; Changming Ke; Shi Liu; Jianhui Wang

doi:10.1021/acsenergylett.3c00004

journal article·2023-04-14

Design of Localized High-Concentration Electrolytes via Donor Number

Juner Chen, Han Zhang, Mingming Fang, Changming Ke, Shi Liu, Jianhui Wang

ACS Energy Letters· Volume 8· Issue 4

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Source abstract

Abstract

Salt-concentrated electrolytes offer properties beyond conventional dilute electrolytes yet suffer from high cost and viscosity which hinder their practical applications. Introducing a secondary solvent as a diluent could reduce the salt content while maintaining the local solution structure of salt-concentrated electrolytes, giving rise to localized high-concentration electrolytes (LHCEs). Through a comprehensive investigation involving over 500 samples, we find that the dielectric constant of solvent, a widely used parameter for electrolyte design, does not serve as a useful screening criterion for diluents; instead, donor number (DN) is an effective design parameter to achieve LHCE structure─i.e., the primary solvent must have DN > 10 and the diluent must have DN ≤ 10. Based on this simple rule, a new LHCE using low-cost m -fluorotoluene diluent is formulated, enabling high-voltage (>4.6 V) and wide-temperature (−40–100 °C) operation of lithium batteries.

Source: openalex_inverted_index · Quality: baseline

Research context

Energy storage

OpenAlex topics: Advanced Battery Materials and Technologies · Advancements in Battery Materials · Advanced Battery Technologies Research

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

Affiliations

Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province, School of Engineering, Westlake University, Hangzhou 310030, China

Institute of Advanced Technology, Westlake Institute for Advanced Study, Hangzhou 310024, China

Department of Chemistry, Zhejiang University, Hangzhou 310027, China

Key Laboratory for Quantum Materials of Zhejiang Province, School of Science, Westlake University, Hangzhou 310030, China

Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, China

Research Center for Industries of the Future, Westlake University, Hangzhou 310030, China

Funding

National Natural Science Foundation of China · Zhejiang?Provincial?Postdoctoral?Science?Foundation · Natural Science Foundation of Zhejiang Province · Westlake Education Foundation

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