Fabrication of Nitrogen-Containing Micro-Expanding Graphite Composites from Waste Graphite Electrodes for Enhanced Lithium Storage.

Xu Fan, Zhuohan Lv, Hongyan Nan, Daoguang Teng, Baolin Xing, Peng Li

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Article in Nanomaterials (Basel, Switzerland), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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6 authors.

Xu FanState Key Laboratory of Critical Metals Beneficiation, Metallurgy and Purification, School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China.

Zhuohan LvState Key Laboratory of Critical Metals Beneficiation, Metallurgy and Purification, School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China.

Hongyan NanState Key Laboratory of Critical Metals Beneficiation, Metallurgy and Purification, School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China.ORCID 0000-0002-0078-1922

Daoguang TengState Key Laboratory of Critical Metals Beneficiation, Metallurgy and Purification, School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China.ORCID 0000-0001-9120-3070

Baolin XingCollege of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454003, China.ORCID 0000-0002-2475-1226

Peng LiState Key Laboratory of Critical Metals Beneficiation, Metallurgy and Purification, School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The large-scale generation of waste graphite not only poses environmental challenges but also provides an opportunity for resource recovery. This study proposes a sustainable strategy that utilizes the graphite cutting waste produced during the production of large graphite electrodes through chemical intercalation, microwave-assisted expansion, and in situ urea nitrogen doping techniques to prepare nitrogen-containing micro-expanded graphite (NMG) composite materials. Structural analysis reveals that the nitrogen-doped amorphous carbon layer formed on the expanded graphite (EG) matrix effectively suppresses excessive expansion while preserving its typical worm-like interlayer morphology and porous structure. XPS confirms successful nitrogen doping with predominant pyridinic-N configuration, introducing abundant defect sites and enhancing lithiophilicity. As an anode for LIBs, NMG delivers an exceptional initial discharge capacity of 1907.5 mAh g

Indexed as

electrochemical performancelithium-ion battery anodemicro-expanding graphitenitrogen dopingwaste graphite electrodes

Identifiers

PMID42042736

DOI10.3390/nano16080485

PMCPMC13118793

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.