A lightweight and metal-free current collector for battery anode applications

Sharma, Jaswinder; Tao, Runming; Polizos, Georgios; Kanbargi, Nihal; LaRiviere, Benjamin; Li, Jianlin

doi:10.1016/j.est.2023.110161

Title: A lightweight and metal-free current collector for battery anode applications

Journal Article · 20 December 2023 · Journal of Energy Storage

DOI: https://doi.org/10.1016/j.est.2023.110161 · OSTI ID:2281979

^[1]; Tao, Runming ^[1];

^[1]; Kanbargi, Nihal ^[1];

^[1];

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Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

The requirement for high energy density batteries is driving the development of high-capacity electrode materials while reducing the amount of inactive battery components such as separators, binders, and current collectors. Though current collectors are an inactive component, they are still required for successful working of a battery cell. Conventional current collectors include aluminum foil for cathode and copper foil for anode. Copper foil is quite heavy (8.7 mg/cm²) for 10μm thickness. Therefore, there is a need for a lightweight current collector for anode applications. In this work, a metal-free current collector comprised of aligned carbon fiber (CFs) layer filled with carbon nanotubes (CNTs) mixed in polymer (P) is developed to be used as a current collector for anodes. Further, anodes coated on the CF-CNT-P showed lower charge transfer resistance and improved rate capability compared with the anodes fabricated on conventional copper foil-based current collectors. The CF-CNT-P are lighter (≈1.5 mg/cm²) than the commonly used copper foil (8.7 mg/cm²), which will increase the gravimetric energy density.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Advanced Materials & Manufacturing Technologies Office (AMMTO)

Grant/Contract Number:: AC05-00OR22725; 2.1.0.245

OSTI ID:: 2281979

Journal Information:: Journal of Energy Storage, Vol. 79; ISSN 2352-152X

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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