Layered germanium phosphide-based anodes for high-performance lithium- and sodium-ion batteries
- Authors
- Nam, Ki-Hun; Jeon, Ki-Joon; Park, Cheol-Min
- Issue Date
- Feb-2019
- Publisher
- ELSEVIER
- Keywords
- Lithium-ion batteries; Sodium-ion batteries; Germanium phosphide; Germanium-based anodes; Phosphorus-based anodes
- Citation
- ENERGY STORAGE MATERIALS, v.17, pp 78 - 87
- Pages
- 10
- Journal Title
- ENERGY STORAGE MATERIALS
- Volume
- 17
- Start Page
- 78
- End Page
- 87
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/25566
- DOI
- 10.1016/j.ensm.2018.07.026
- ISSN
- 2405-8297
2405-8297
- Abstract
- A layered germanium phosphide (GeP3) was synthesized in a straightforward manner using a simple solid-state synthetic method, and its electrochemical behavior for lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs) was investigated. During Li-insertion and extraction, the GeP3 experienced a sequential three-step (topotactic-transition, conversion, and alloying) and two-step (dealloying and recombination) reaction. During Na-insertion and extraction, GeP3 had a one-step (conversion) and two-step (recombination and topotactictransition) reaction. Based on the interesting phase change mechanisms during Li-and Na-insertion/extraction, the GeP3-based nanocomposite exhibited superior electrochemical performance, such as large reversible capacity (first reversible capacity: 1526 mAh g(-1) for LIB, 984 mAh g(-1) for SIB), high initial Coulombic efficiencies (86.3% for LIB, 81.3% for SIB), stable cycle life (capacity retention for LIB: 95% in 0-2 V after 30 cycles, 87% in 0.35-2 V after 100 cycles, and 93% in 0.64-2 V after 100 cycles, capacity retention for SIB: 95% in 0-2 V after 30 cycles), and rapid rate-capabilities (LIB: 860 mAh g(-1) in 0.35-2 V at 2C-rate, SIB: 520 mAh g(-1) in 0-2 V at 2C-rate). Overall, the layered GeP3-based anode with its interesting Li-and Na-reaction mechanisms will be a promising alternative anode for high-performance LIBs and SIBs.
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Collections - Department of Materials Science and Engineering > 1. Journal Articles
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