Journal
ADVANCED MATERIALS
Volume 29, Issue 5, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201604708
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Funding
- National High-tech R&D Program of China (863 Program) [2015AA034601]
- National Natural Science Foundation of China [51522205, 51472098, 21271078]
- Baosteel-Australia Joint Research and Development Centre (BAJC) [BA14006]
- Auto CRC [1-117]
- ARENA Smart Sodium Storage System (S4) project
- China Scholarship Council (CSC) from China
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The electrochemical mechanism of nano-crystalline silicon anode in sodium ion batteries is first studied via in operando Raman and in operando X-ray diffraction. An irreversible structural conversion from crystalline silicon to amorphous silicon takes place during the initial cycles, leading to ultrafast reversible sodium insertion in the newly generated amorphous silicon. Furthermore, an optimized silicon/ carbon composite has been developed to further improve its electrochemical performance.
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