Sheet-type Li6PS5Cl-infiltrated Si anodes fabricated by solution process for all-solid-state lithium-ion batteries

Dong Hyeon Kim, Han Ah Lee, Yong Bae Song, Jun Woo Park, Sang Min Lee, Yoon Seok Jung

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

All-solid-state lithium-ion batteries (ASLBs) employing sulfide solid electrolytes are considered a promising alternative to conventional lithium-ion batteries (LIBs) from the perspectives of safety and high energy density. From a practical point of view, the development of sheet-type electrodes employing alternative electrode materials by scalable fabrication is of prime importance. While Si has been extensively studied for next-generation LIBs, reports on ASLBs are scarce. Herein, we fabricate sheet-type Si composite electrodes by infiltrating conventional LIB electrodes with solid electrolytes using a homogeneous Li6PS5Cl-ethanol solution. Further, we systematically investigate effects of the particle size (micro- vs. nano-Si) and polymeric binders (polyvinylidene fluoride vs. polyacrylic acid/carboxymethyl cellulose) on the electrochemical performance of ASLBs under varying external pressures (140, 20, and 5 MPa) upon cycling. Owing to intimate ionic contacts enabled by liquefied solid electrolytes, the Li6PS5Cl-infiltrated Si electrodes show higher capacities of over 3000 mA h g−1 at 0.25 mA cm−2 and 30 °C as compared with conventional dry-mixed electrodes. At 20 MPa, the Si electrodes using micro-Si and polyvinylidene fluoride show marginal degradation of performance. The high energy density of 338 W h kg−1 of LiCoO2/Si ASLBs fabricated using the Li6PS5Cl-infiltrated electrodes is demonstrated, highlighting the prospect of high-energy practical ASLBs.

Original languageEnglish
Pages (from-to)143-150
Number of pages8
JournalJournal of Power Sources
Volume426
DOIs
Publication statusPublished - 2019 Jun 30

Bibliographical note

Funding Information:
This work was supported by the KERI Primary research program of MSIP / NST (grant no. 18-12-N0101-20 ) and by the research fund of Hanyang University (grant no. HY-2018 ).

Funding Information:
This work was supported by the KERI Primary research program of MSIP / NST (grant no. 18-12-N0101-20) and by the research fund of Hanyang University (grant no. HY-2018).

Publisher Copyright:
© 2019 Elsevier B.V.

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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