Abstract
The application of lithium (Li) metal anodes in Li metal batteries has been hindered by growth of Li dendrites, which lead to short cycling life. Here a Li-ion-affinity leaky film as a protection layer is reported to promote a dendrite-free Li metal anode. The leaky film induces electrokinetic phenomena to enhance Li-ion transport, leading to a reduced Li-ion concentration polarization and homogeneous Li-ion distribution. As a result, the dendrite-free Li metal anode during Li plating/stripping is demonstrated even at an extremely high deposition capacity (6 mAh cm−2) and current density (40 mA cm−2) with improved Coulombic efficiencies. A full cell battery with the leaky-film protected Li metal as the anode and high-areal-capacity LiNi0.8Co0.1Mn0.1O2 (NCM-811) (≈4.2 mAh cm−2) or LiFePO4 (≈3.8 mAh cm−2) as the cathode shows improved cycling stability and capacity retention, even at lean electrolyte conditions.
Original language | English (US) |
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Article number | 1900704 |
Journal | Advanced Energy Materials |
Volume | 9 |
Issue number | 22 |
DOIs | |
State | Published - Jun 12 2019 |
All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- General Materials Science