4.7 Article

Using conductive carbon fabric to fabricate binder-free Ni-rich cathodes for Li-ion batteries

期刊

INTERNATIONAL JOURNAL OF ENERGY RESEARCH
卷 46, 期 4, 页码 4671-4679

出版社

WILEY
DOI: 10.1002/er.7462

关键词

carbon fabric; corrosion; current collector; Li-ion cathode; NCM; Ni-rich

资金

  1. Ministry of Science and Technology [MOST109-2221-E007-113]

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Carbon fabric is proposed as an alternative current collector for water-processed NCM811 cathodes to prevent electrode corrosion. The interlaced fiber bundles in carbon fabric feature voids and a large surface area for electrode materials, while the network structure serves as a pathway for electron transport. However, a conductive agent is also needed to improve capacity retention in NCM811 cells, although too much of it can affect material distribution.
Carbon fabric is proposed as an alternative current collector for fabricating water-processed LiNi0.8Co0.1Mn0.1O2 (NCM811) cathodes in order to prevent electrode corrosion problems from the use of conventional Al foil. The interlaced fiber bundles in carbon fabric feature plenty of voids and a large surface area to accommodate electrode materials without requiring an insulating binder. Further, the connected network structure of carbon fabric serves as a three-dimensional pathway for electron transport. However, our experiments also reveal the necessity to adopt a conductive agent, although a very high content of it reduces the uniform distribution of cathode materials. When increasing the content of conductive agent from 3% to 15%, capacity retention of the corresponding NCM811 cell rises from 76% to 93% after charge/discharge at 0.5 C for 300 cycles. The causes of this increase are discussed.

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