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Self-smoothing Anode for Achieving High-Energy Lithium Metal Batteries Under Realistic Conditions

Self-smoothing Anode for Achieving High-Energy Lithium Metal Batteries Under Realistic Conditions

Chaojiang Niu, Huilin Pan, Wu Xu, Jie Xiao, Ji-Guang Zhang, Langli Luo, Chongmin Wang, Donghai Mei, Jiashen Meng, Xuanpeng Wang, Ziang Liu, Liqiang Mai, Jun Liu

Nat Nanotechnol. 2019 Jun;14(6):594-601.

PMID: 31036907

Abstract:

Despite considerable efforts to stabilize lithium metal anode structures and prevent dendrite formation, achieving long cycling life in high-energy batteries under realistic conditions remains extremely difficult due to a combination of complex failure modes that involve accelerated anode degradation and the depletion of electrolyte and lithium metal. Here we report a self-smoothing lithium-carbon anode structure based on mesoporous carbon nanofibres, which, coupled with a lithium nickel-manganese-cobalt oxide cathode with a high nickel content, can lead to a cell-level energy density of 350-380 Wh kg-1 (counting all the active and inactive components) and a stable cycling life up to 200 cycles. These performances are achieved under the realistic conditions required for practical high-energy rechargeable lithium metal batteries: cathode loading ≥4.0 mAh cm-2, negative to positive electrode capacity ratio ≤2 and electrolyte weight to cathode capacity ratio ≤3 g Ah-1. The high stability of our anode is due to the amine functionalization and the mesoporous carbon structures that favour smooth lithium deposition.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP346417978	Lithium nickel manganese cobalt oxide		346417-97-8	Price

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