遠くへ行く:炭素繊維、ナノチューブがEVバッテリーの軽量化を実現(Going the distance:Carbon fiber, nanotubes make lighter EV batteries)

ad
ad

炭素繊維とナノチューブでEVバッテリーを軽量化 Carbon fiber, nanotubes make lighter EV batteries

2024-01-09 オークリッジ国立研究所(ORNL)

遠くへ行く:炭素繊維、ナノチューブがEVバッテリーの軽量化を実現(Going the distance:Carbon fiber, nanotubes make lighter EV batteries)Jaswinder Sharma makes battery coin cells with a lightweight current collector made of thin layers of aligned carbon fibers in a polymer with carbon nanotubes. Credit: Genevieve Martin/ORNL, U.S. Dept. of Energy

◆米エネルギー省のオークリッジ国立研究所の研究者たちは、軽量で金属フリーな電流集電体を開発し、これによりリチウムイオン電池の軽量化が可能となる可能性がある。
◆通常電池セルの重量に寄与せずに10%の重量を占める電流集電体に焦点を当て、ポリマーベースの複合材料と炭素繊維を使用した新しい電流集電体を提案。試験では、従来の銅箔と同等またはそれ以上の性能を示し、重量が80%から90%軽減されるため、電池パックのエネルギー密度向上に寄与する可能性がある。

<関連情報>

軽量で金属を使用しないバッテリー負極用集電体 A lightweight and metal-free current collector for battery anode applications

Jaswinder Sharma, Runming Tao, Georgios Polizos, Nihal Kanbargi, Benjamin LaRiviere, Jianlin Li
Journal of Energy Storage  Available online: 20 December 2023
DOI:https://doi.org/10.1016/j.est.2023.110161

Abstract

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 10 μm 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. 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.

0402電気応用
ad
ad
Follow
ad
タイトルとURLをコピーしました