Rational design of polymer-based insulating scaffolds for high-capacity lithium metal batteries
- Authors
- Jo, Jinhyeon; Kim, Subin; Kwon, Junhwa; Cho, Ki-Yeop; Song, Hayong; Shin, Jaewook; Lee, Seung Jong; Kim, Wonkeun; Ryu, Kyoung Han; Eom, Kwangsup
- Issue Date
- 2024-09
- Publisher
- Elsevier BV
- Citation
- Chemical Engineering Journal, v.495
- Abstract
- Lithium metal is a promising anode material for next-generation high-energy-density secondary batteries. However, the uncontrolled growth of Li dendrites leads to infinite volume expansion and poor cycling stability. Herein, we propose a designable insulating polydopamine (PDA)-coated porous polytetrafluoroethylene (PTFE) scaffold. A porous PTFE (pPTFE) scaffold with micron-sized pores was fabricated, which provided bottom-up Li deposition owing to its insulating nature. Furthermore, the PDA-coated porous PTFE (PDA-pPTFE) scaffold provided internal space for Li growth and homogenized the Li-ion flux with abundant polar functional groups in the PDA, enabling "bottom-up" Li deposition within the scaffold without dendrite growth. This uniquely designed scaffold demonstrated excellent performance in half and symmetric cells with a small voltage hysteresis and dendrite-free Li plating. Moreover, when coupled with high-loading NCM cathodes (similar to 4 mA h cm(-2)), the PDA-pPTFE-based full cells exhibited stable cycling and rate performance, even with a low NP ratio of 1.0 at a rate of 1/3C, and exhibited a high energy density of 801 W h L-1. These results indicated the potential of the PDA-pPTFE scaffold as an anode material for highly stable next-generation rechargeable batteries.
- Keywords
- HIGH-ENERGY; ANODE; DEPOSITION; ION; STRATEGIES; DENSITY; GROWTH; Lithium metal batteries; Lithium metal anodes; Porous scaffold; Polydopamine; PTFE; High energy full-cell
- ISSN
- 1385-8947
- URI
- https://pubs.kist.re.kr/handle/201004/150295
- DOI
- 10.1016/j.cej.2024.153383
- Appears in Collections:
- KIST Article > 2024
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