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Carbon Nanotube Current Collector for Anode-free Battery

Carbon Nanotube Current Collector for Anode-free Battery Lithium metal batteries (LMBs) have been gained attention for next-generation electrical energy storage because of their high energy density on both volumetric and gravimetric bases. However, in order to match the capacity ratio between Li metal and cathode, the thickness of Li metal must be 100 µm or less, but it is difficult to manufacture thin Li metal in a large area. Rather than changing the thickness of lithium, the anode-free battery, which has the advantage of achieving high energy density, is an alternative for LMB. Also, unlike LMBs, self-discharging does not occur in the anode-free battery after the battery is assembled. In addition, LMBs have low cycle stability due to moss-like deposition and dendrite growth during charge and discharge. In this work, carbon nanotube (CNT) film was used as a current collector for an anode-free battery, and the electrochemical properties were analyzed. The surface morphology of Li metal plated on the CNT film was smooth and not mossy-like because Li nucleation and Li growth occurred uniformly due to the low Li nucleation activation energy and the large specific surface area of CNT film, which made the Li flux occurs evenly. These results demonstrate the high potential of the CNT film as a current collector for an anode-free battery. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Fibers and Polymers Springer Journals

Carbon Nanotube Current Collector for Anode-free Battery

Im, Da-som; Jeong, Youngjin
Fibers and Polymers , Volume 23 (8) – Aug 1, 2022
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Publisher
Springer Journals
Copyright
Copyright © The Korean Fiber Society 2022
ISSN
1229-9197
eISSN
1875-0052
DOI
10.1007/s12221-022-4953-y
Publisher site
See Article on Publisher Site

Abstract

Lithium metal batteries (LMBs) have been gained attention for next-generation electrical energy storage because of their high energy density on both volumetric and gravimetric bases. However, in order to match the capacity ratio between Li metal and cathode, the thickness of Li metal must be 100 µm or less, but it is difficult to manufacture thin Li metal in a large area. Rather than changing the thickness of lithium, the anode-free battery, which has the advantage of achieving high energy density, is an alternative for LMB. Also, unlike LMBs, self-discharging does not occur in the anode-free battery after the battery is assembled. In addition, LMBs have low cycle stability due to moss-like deposition and dendrite growth during charge and discharge. In this work, carbon nanotube (CNT) film was used as a current collector for an anode-free battery, and the electrochemical properties were analyzed. The surface morphology of Li metal plated on the CNT film was smooth and not mossy-like because Li nucleation and Li growth occurred uniformly due to the low Li nucleation activation energy and the large specific surface area of CNT film, which made the Li flux occurs evenly. These results demonstrate the high potential of the CNT film as a current collector for an anode-free battery.

Journal

Fibers and Polymers – Springer Journals

Published: Aug 1, 2022

Keywords: Anode-free battery; Carbon nanotube; Li metal anode; Li nucleation energy; Current collector

References