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Graphene collage on Ni-rich layered oxide cathodes for advanced lithium-ion batteries

Author

Listed:
  • Chang Won Park

    (Sungkyunkwan University
    Samsung SDI Co., LTD)

  • Jung-Hun Lee

    (Sungkyunkwan University)

  • Jae Kwon Seo

    (Sungkyunkwan University)

  • Won Young Jo

    (Sungkyunkwan University)

  • Dongmok Whang

    (Sungkyunkwan University
    Sungkyunkwan University)

  • Soo Min Hwang

    (Sungkyunkwan University)

  • Young-Jun Kim

    (Sungkyunkwan University
    Sungkyunkwan University)

Abstract

The energy storage performance of lithium-ion batteries (LIBs) depends on the electrode capacity and electrode/cell design parameters, which have previously been addressed separately, leading to a failure in practical implementation. Here, we show how conformal graphene (Gr) coating on Ni-rich oxides enables the fabrication of highly packed cathodes containing a high content of active material (~99 wt%) without conventional conducting agents. With 99 wt% LiNi0.8Co0.15Al0.05O2 (NCA) and electrode density of ~4.3 g cm-3, the Gr-coated NCA cathode delivers a high areal capacity, ~5.4 mAh cm−2 (~38% increase) and high volumetric capacity, ~863 mAh cm-3 (~34% increase) at a current rate of 0.2 C (~1.1 mA cm-2); this surpasses the bare electrode approaching a commercial level of electrode setting (96 wt% NCA; ~3.3 g cm-3). Our findings offer a combinatorial avenue for materials engineering and electrode design toward advanced LIB cathodes.

Suggested Citation

  • Chang Won Park & Jung-Hun Lee & Jae Kwon Seo & Won Young Jo & Dongmok Whang & Soo Min Hwang & Young-Jun Kim, 2021. "Graphene collage on Ni-rich layered oxide cathodes for advanced lithium-ion batteries," Nature Communications, Nature, vol. 12(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-22403-w
    DOI: 10.1038/s41467-021-22403-w
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    Cited by:

    1. Gang Sun & Fu-Da Yu & Mi Lu & Qingjun Zhu & Yunshan Jiang & Yongzhi Mao & John A. McLeod & Jason Maley & Jian Wang & Jigang Zhou & Zhenbo Wang, 2022. "Surface chemical heterogeneous distribution in over-lithiated Li1+xCoO2 electrodes," Nature Communications, Nature, vol. 13(1), pages 1-10, December.

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