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Enabling Lithium-Metal Anode Encapsulated in a 3D Carbon Skeleton with a Superior Rate Performance and Capacity
XiaoHui Zhou, WuJun Huang, ChenGuang Shi
1Institute for Materials Research and Innovation, Department of Chemical Engineering , University of Louisiana at Lafayette , Lafayette , Louisiana 70504 , United States.
ACS Applied Materials & Interfaces
|September 25, 2018
Summary
Researchers developed a novel lithium-metal anode using a 3D carbon paper network. This structure effectively suppresses lithium dendrite formation, enabling stable and long-lasting battery performance.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Lithium-metal anodes offer high energy density but suffer from dendrite formation, hindering practical application.
- Developing stable solid-electrolyte interfaces is crucial for safe and efficient lithium-metal batteries.
Purpose of the Study:
- To engineer a robust three-dimensional carbon paper (3DCP) network for lithium-metal anode fabrication.
- To investigate the dendrite suppression capabilities and electrochemical performance of lithium deposited within the 3DCP structure.
Main Methods:
- Fabrication of a composite 3D carbon paper network using carbon fibers and graphene nanosheets.
- Electrochemical testing of Li@3DCP anodes in full cells with LiFePO4 and LiNi0.8Co0.15Al0.05O2 cathodes.
- Analysis of lithium plating/stripping behavior, cycling stability, and rate capability.
Main Results:
- The Li@3DCP anode demonstrated uniform lithium nucleation and a stable solid-electrolyte interface.
- Achieved high areal capacity (10 mAh cm-2) with no dendrite formation after 1000 cycles at 4 C.
- Exhibited excellent cycling stability (>1000 h), low voltage polarization (<20 mV at 1 mA cm-2), and high plating/stripping efficiency (99.0%).
Conclusions:
- The 3DCP structure provides mechanical support and promotes uniform lithium deposition, effectively suppressing dendrite growth.
- The Li@3DCP anode shows promise for high-performance lithium-metal batteries, including enhanced rate capability and high-temperature operation.
- This approach offers a viable strategy for realizing safe and durable lithium-metal anodes.
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