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Self‐Supporting, Flexible, Additive‐Free, and Scalable Hard Carbon Paper Self‐Interwoven by 1D Microbelts: Superb Room/Low‐Temperature Sodium Storage and Working Mechanism
- Source :
- Advanced Materials. 31:1903125
- Publication Year :
- 2019
- Publisher :
- Wiley, 2019.
-
Abstract
- Hard carbon is regarded as a promising anode material for sodium-ion batteries (SIBs). However, it usually suffers from the issues of low initial Coulombic efficiency (ICE) and poor rate performance, severely hindering its practical application. Herein, a flexible, self-supporting, and scalable hard carbon paper (HCP) derived from scalable and renewable tissue is rationally designed and prepared as practical additive-free anode for room/low-temperature SIBs with high ICE. In ether electrolyte, such HCP achieves an ICE of up to 91.2% with superior high-rate capability, ultralong cycle life (e.g., 93% capacity retention over 1000 cycles at 200 mA g-1 ) and outstanding low-temperature performance. Working mechanism analyses reveal that the plateau region is the rate-determining step for HCP with a lower electrochemical reaction kinetics, which can be significantly improved in ether electrolyte.
- Subjects :
- business.product_category
Materials science
Mechanical Engineering
Sodium
chemistry.chemical_element
02 engineering and technology
Electrolyte
010402 general chemistry
021001 nanoscience & nanotechnology
Electrochemistry
01 natural sciences
0104 chemical sciences
Anode
Chemical engineering
chemistry
Mechanics of Materials
Scalability
General Materials Science
Carbon paper
0210 nano-technology
business
Carbon
Faraday efficiency
Subjects
Details
- ISSN :
- 15214095 and 09359648
- Volume :
- 31
- Database :
- OpenAIRE
- Journal :
- Advanced Materials
- Accession number :
- edsair.doi.dedup.....10ab4f81511843edd2aaa0e4883c84a3