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In situ polymerization design of a quasi-solid electrolyte enhanced by NMP additive for lithium metal batteries

Wang, Shangjie (författare)
KTH,Skolan för kemi, bioteknologi och hälsa (CBH),aSchool of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
Lv, Qiang (författare)
aSchool of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China; cMIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, State Key Laboratory of Urban Water Resource and Environment, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China; dDepartment of Materials Science and Engineering, National University of Singapore, Singapore 117575, Singapore
Jing, Yutong (författare)
aSchool of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China; cMIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, State Key Laboratory of Urban Water Resource and Environment, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
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Wang, Bo (författare)
aSchool of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China; cMIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, State Key Laboratory of Urban Water Resource and Environment, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
Wang, Dianlong (författare)
aSchool of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China; cMIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, State Key Laboratory of Urban Water Resource and Environment, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
Liu, Huakun (författare)
eInstitute for Superconducting & Electronic Materials, Australian Institute of Innovative Materials, University of Wollongong, Wollongong, NSW 2500, Australia; fInstitute of Energy Material Science, University of Shanghai for Science and Technology, Shanghai 200093, China
Dou, Shixue (författare)
eInstitute for Superconducting & Electronic Materials, Australian Institute of Innovative Materials, University of Wollongong, Wollongong, NSW 2500, Australia; fInstitute of Energy Material Science, University of Shanghai for Science and Technology, Shanghai 200093, China
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 (creator_code:org_t)
Elsevier B.V. 2024
2024
Engelska.
Ingår i: Energy Storage Materials. - : Elsevier B.V.. - 2405-8289 .- 2405-8297. ; 69
  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
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  • Solid polymer electrolytes (SPEs) are considered one promising candidate for lithium metal batteries due to their high flexibility, low cost, and roll-to-roll scalability. However, conventional SPEs prepared via ex situ methods are confronted with challenges such as poor contact and high resistance at the electrode|SPE interface, as well as low ionic conductivity at room temperature. In this study, we developed a quasi-solid electrolyte (QSE) using an in situ polymerization approach, employing butyl acrylate as the monomer and incorporating NMP as an additive. Spectroscopic investigations and DFT calculations revealed that NMP tends to form an overleaf-structured [Li(NMP)3][TFSI] complex with LiTFSI, promoting lithium salt dissociation. Owing to this advantage, the QSE exhibits high room-temperature ionic conductivity (6.94 × 10−4 S cm−1) and an extensive electrochemical stability window (5.01 V vs. Li+/Li). Furthermore, the in situ polymerization method facilitates full contact at the interface, enhancing the interfacial stability and reducing the interface resistance, thus resulting in stable cycling of Li|Built-in QSE|Li symmetric cell for 1100 h at 0.1 mA cm−2. The assembled LiFePO4|Built-in QSE|Li cell also demonstrates excellent rate and long-term cycling performance. Our findings offer valuable insights into the interaction between organic additives and lithium salts and present a novel strategy for the development of polymer electrolytes.

Ämnesord

NATURVETENSKAP  -- Kemi -- Materialkemi (hsv//swe)
NATURAL SCIENCES  -- Chemical Sciences -- Materials Chemistry (hsv//eng)

Nyckelord

In-situ polymerization
Lithium metal batteries
Organic additives
Quasi-solid electrolytes

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