High Rate Capability of a LiNi0.84Co0.12Mn0.04O2 Cathode with a Uniform Conducting Network of Functionalized Graphene Nanoribbons for Li-Ion Batteries
- Title
- High Rate Capability of a LiNi0.84Co0.12Mn0.04O2 Cathode with a Uniform Conducting Network of Functionalized Graphene Nanoribbons for Li-Ion Batteries
- Author
- 송태섭
- Keywords
- Nanoparticles; Electrodes; Solvents; Carbon nanotubes; Electrical conductivity
- Issue Date
- 2020-06
- Publisher
- AMER CHEMICAL SOC
- Citation
- INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, v. 59, no. 28, page. 12889−12895
- Abstract
- LiNixCoyMnzO2 cathode materials are technologically important for high-energy-density Li-ion batteries. However, poor electronic conductivity limits their practical use compared to conventional LiCoO2 cathodes. There are efforts to the use of multiwalled carbon nanotubes (MWCNTs) as a highly conductive agent, but they have poor dispersibility in most polar solvents. Here, we report a rheological behavior of functionalized graphene nanoribbons (GNRs) and their use for a high rate capability of a LiNi0.84Co0.12Mn0.04O2 cathode. The functionalized GNRs are prepared by chemical unzipping MWCNTs, enabling good dispersion in N-methyl-2-pyrrolidone. The improved dispersibility leads to the slurry with fluid-like behavior and an electrode with a uniform conductive network of carbon black/GNRs, improved cohesion strength, and decreased charge transfer resistance. As a result, the electrode shows the highest capacity retention compared to the electrode with only carbon black or carbon black/MWCNTs at a high 4 C-rate.
- URI
- https://pubs.acs.org/doi/10.1021/acs.iecr.0c01932https://repository.hanyang.ac.kr/handle/20.500.11754/167431
- ISSN
- 0888-5885
- DOI
- 10.1021/acs.iecr.0c01932
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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