A Robust and Conductive Black Tin Oxide Nanostructure Makes Efficient Lithium-Ion Batteries Possible
- Peking Univ., Beijing (China). Beijing National Lab. for Molecular Sciences. State Key Lab. of Rare Earth Materials Chemistry and Applications. College of Chemistry and Molecular Engineering
- Chinese Academy of Sciences (CAS), Shanghai (China). State Key Lab. of High Performance Ceramics and Superfine Microstructures. Shanghai Inst. of Ceramics
- Beijing Univ. of Technology (China). Inst. of Microstructure and Properties of Advanced Materials
- Univ. of Pennsylvania, Philadelphia, PA (United States). Dept. of Materials Science and Engineering
- Peking Univ., Beijing (China). Beijing National Lab. for Molecular Sciences. State Key Lab. of Rare Earth Materials Chemistry and Applications. College of Chemistry and Molecular Engineering; Chinese Academy of Sciences (CAS), Shanghai (China). State Key Lab. of High Performance Ceramics and Superfine Microstructures. Shanghai Inst. of Ceramics
SnO 2 ‐based lithium‐ion batteries have low cost and high energy density, but their capacity fades rapidly during lithiation/delithiation due to phase aggregation and cracking. These problems can be mitigated by using highly conducting black SnO 2− x , which homogenizes the redox reactions and stabilizes fine, fracture‐resistant Sn precipitates in the Li 2 O matrix. Such fine Sn precipitates and their ample contact with Li 2 O proliferate the reversible Sn → Li x Sn → Sn → SnO 2 /SnO 2− x cycle during charging/discharging. SnO 2− x electrode has a reversible capacity of 1340 mAh g −1 and retains 590 mAh g −1 after 100 cycles. The addition of highly conductive, well‐dispersed reduced graphene oxide further stabilizes and improves its performance, allowing 950 mAh g −1 remaining after 100 cycles at 0.2 A g −1 with 700 mAh g −1 at 2.0 A g −1 . Conductivity‐directed microstructure development may offer a new approach to form advanced electrodes.
- Research Organization:
- Univ. of Pennsylvania, Philadelphia, PA (United States); Peking Univ., Beijing (China); Chinese Academy of Sciences (CAS), Shanghai (China)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Key Research and Development Program of China; National Science Foundation of China; Science and Technology Commission of Shanghai (China); Key Research Program of Chinese Academy of Sciences
- Grant/Contract Number:
- SC0007064; 2016YFB0901600; 51402334; 51502331; 14520722000; KGZD-EW-T06; DE‐FG02‐11ER46814
- OSTI ID:
- 1533039
- Alternate ID(s):
- OSTI ID: 1401538
- Journal Information:
- Advanced Materials, Vol. 29, Issue 24; ISSN 0935-9648
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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