Dendrite-free Li metal deposition in all-solid-state lithium sulfur batteries with polymer-in-salt polysiloxane electrolyte

By Long Chen, Li‐Zhen Fan. Energy Storage Materials, 2018

217 citations recorded by the source corpus.

Abstract Replacement of solid polymer electrolyte (SPE) to routine liquid electrolyte is highly desirable for high-energy-density lithium sulfur batteries due to its low volatility, high safety and the ability to suppress shuttle effect. Herein, a polymer-in-salt polysiloxane SPE was fabricated with bi-grafted polysiloxane copolymer, lithium bis(trifluoromethanesulfonyl)imide and poly(vinylidene fluoride), which shows higher ionic conductivity (7.8 × 10-4 S cm-1 at 25 °C). To obtain the satisfactory ionic conductivity and high mechanical property of solid electrolyte simultaneously, cellulose acetate matrix was combined as a rigid substrate to prepare composite polymer electrolyte (CPE) that possesses high ionic conductivity (4.0 × 10-4 S cm-1), enhanced mechanical strength (6.8 MPa), wide electrochemical stability window (4.7 V vs. Li+/Li), and high ion transference number (0.52) at ambient temperature. In addition, the CPE effectively inhibits the growth of lithium dendrites and diffusion of polysulfides. The assembled lithium sulfur battery with CPE exhibits good room-temperature cycling performance at 1C, which indicates that such polymer-in-salt polysiloxane based composite electrolyte membranes can be applied to ambient temperature all-solid-state lithium sulfur batteries.

Subfields: Automotive Engineering, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/0696e33b637ec9cfe9456544be0aed203eabab8a

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In Automotive Engineering

1. Dong Zhou
2. Yong Yang

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2. Jinghua Wu
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Citations in the corpus

• Recent Progress in All-Solid-State Lithium−Sulfur Batteries Using High Li-Ion Conductive Solid Electrolytes (2019, background): “, ionic conductivity, lithium salt concentration, shear modulus) [41, 46, 48, 64].”
• Structural Design of Lithium–Sulfur Batteries: From Fundamental Research to Practical Application (2018, unknown): “[410] reported a novel nanostruture polymer-in-salt polysiloxane electrolyte applied to all-solid-state Li–S batteries.”
• All-Solid-State Lithium Batteries with Sulfide Electrolytes and Oxide Cathodes (2020, background): “In terms of anodes, although the use of lithium metal is necessary to obtain high-energy density, recent research has revealed that Li dendrites can easily form in the bulk or grain boundaries of inorganic sulfide electrolytes [15, 16].”