Valorizing low cost and renewable lignin as hard carbon for Na-ion batteries: Impact of lignin grade

Camélia Matei Ghimbeu, Biao Zhang, Alicia Martinez de Yuso, Bénédicte Réty, Jean Marie Tarascon

Research output: Journal article publicationJournal articleAcademic researchpeer-review

26 Citations (Scopus)

Abstract

Lignin, the second most abundant biopolymer and rich in aromatic entities, is a by-product of paper industry and mainly burned to produce energy. Its commercialization for high-value added products remains largely unexplored today. Herein, we explored the preparation of hard carbon anodes for sodium-ion batteries using the two most common lignin grades, i.e, lignin kraft and lignin sulphonate. The lignin kraft hard carbon (LK-HC) shows small specific surface area (1.8 m2 g−1) and a dense random-like morphology while the latter lignin sulphonate hard carbon (LS-HC) presents a high surface area (180 m2 g−1) and spherical particles containing macropores. Their electrochemical performances vs. Na+ revealed a steady capacity of 181 mAh g−1 over cycling for LK-HC, as compared to a capacity of 205 mAh g−1 for LS-HC which fades after 30 cycles due to an impurity-driven growth of a blocking solid electrolyte interphase (SEI). To circumvent this issue, an efficient washing procedure was successfully implemented enabling to obtain (LSW-HC) carbons which deliver a high and stable capacity (284 mAh g−1) along efficiency (78.1%).

Original languageEnglish
Pages (from-to)634-647
Number of pages14
JournalCarbon
Volume153
DOIs
Publication statusPublished - Nov 2019

Keywords

  • Biopolymer
  • Hard carbon
  • Lignin
  • Na-ion batteries

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

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