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

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.

SUBMITTER: Park CW 

PROVIDER: S-EPMC8035182 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature

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

Park Chang Won CW   Lee Jung-Hun JH   Seo Jae Kwon JK   Jo Won Young WY   Whang Dongmok D   Hwang Soo Min SM   Kim Young-Jun YJ  

Nature communications 20210409 1

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% LiNi<sub>0.8</sub>Co<sub>0.15</sub>Al<sub  ...[more]

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