Journal
ENERGY STORAGE MATERIALS
Volume 24, Issue -, Pages 602-609Publisher
ELSEVIER
DOI: 10.1016/j.ensm.2019.06.016
Keywords
Metallic lithium anodes; Dendrite; Vertically aligned porous carbon structure; Capillary force; Template synthesis
Funding
- National Research Foundation of Korea (MSIP) [2017R1A2B2010148]
- Climate Change Research Hub of EEWS from KAIST [N11170059]
- International Cooperation in S&T Program through the National Research Foundation of Korea - Ministry of Science and ICT [NRF-2016K2A9A1A06934767]
- Basic Research Lab Program through the National Research Foundation of Korea - Ministry of Science and ICT [NRF-2017R1A4A1015533]
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Metallic lithium anodes hold the key for next-generation high-energy batteries. However, the safety issues and poor Coulombic efficiency induced by dendritic growth of lithium hinder their commercialization. We address these limitations with vertically aligned nanoporous carbon tubes (VNPCT) as a high performing, stable host for lithium. The designed carbon structure can efficiently direct Li deposition inside the tubular structure through uniform lithium flux and capillary force. Furthermore, the tubular host can greatly reduce the effective current density to eliminate the dendrite formation even at 5 mA cm(-2). A high areal lithium deposition of 2 mAh cm(-2) can be plated efficiently on the designed structure without any dendritic morphology. Additionally, the engineered lithium metal host exhibited a stable cycle life and higher Coulombic efficiency of 96% over 200 cycles at a current density of 0.5 mA cm(-2), which is superior to conventional 2D planar hosts. A full cell performance of lithiated VNPCT (VNPCT@Li) and LiFePO4 cathode was demonstrated.
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