Comprehensive Enhancement of Nanostructured Lithium-Ion Battery Cathode Materials via Conformal Graphene Dispersion

Kan Sheng Chen, Rui Xu, Norman S. Luu, Ethan B. Secor, Koichi Hamamoto, Qianqian Li, Soo Kim, Vinod K. Sangwan, Itamar Balla, Linda M. Guiney, Jung Woo T. Seo, Xiankai Yu, Weiwei Liu, Jinsong Wu, Chris Wolverton, Vinayak P. Dravid, Scott A. Barnett, Jun Lu, Khalil Amine, Mark C. Hersam*

*Corresponding author for this work

Research output: Contribution to journalLetterpeer-review

79 Scopus citations


Efficient energy storage systems based on lithium-ion batteries represent a critical technology across many sectors including consumer electronics, electrified transportation, and a smart grid accommodating intermittent renewable energy sources. Nanostructured electrode materials present compelling opportunities for high-performance lithium-ion batteries, but inherent problems related to the high surface area to volume ratios at the nanometer-scale have impeded their adoption for commercial applications. Here, we demonstrate a materials and processing platform that realizes high-performance nanostructured lithium manganese oxide (nano-LMO) spinel cathodes with conformal graphene coatings as a conductive additive. The resulting nanostructured composite cathodes concurrently resolve multiple problems that have plagued nanoparticle-based lithium-ion battery electrodes including low packing density, high additive content, and poor cycling stability. Moreover, this strategy enhances the intrinsic advantages of nano-LMO, resulting in extraordinary rate capability and low temperature performance. With 75% capacity retention at a 20C cycling rate at room temperature and nearly full capacity retention at −20 °C, this work advances lithium-ion battery technology into unprecedented regimes of operation.

Original languageEnglish (US)
Pages (from-to)2539-2546
Number of pages8
JournalNano letters
Issue number4
StatePublished - Apr 12 2017


  • Lithium manganese oxide
  • high packing density
  • high rate capability
  • low temperature
  • nanoparticle
  • spinel

ASJC Scopus subject areas

  • General Chemistry
  • Condensed Matter Physics
  • Mechanical Engineering
  • Bioengineering
  • General Materials Science


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