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Hybrid Anodes of Lithium Titanium Oxide and Carbon Onions for Lithium-Ion and Sodium-Ion Energy Storage

  • This study demonstrates the hybridization of Li4Ti5O12 (LTO) with different types of carbon onions synthesized from nanodiamonds. The carbon onions mixed with a Li4Ti5Ox precursor for sol–gel synthesis. These hybrid materials are tested as anodes for both lithium-ion battery (LIB) and sodium-ion battery (SIB). Electrochemical characterization for LIB application is carried out using 1 m LiPF6 in a 1:1 (by volume) ethylene carbonate and dimethyl carbonate as the electrolyte. For lithium-ion intercalation, LTO hybridized with carbon onions from the inert-gas route achieves an excellent electrochemical performance of 188 mAh g−1 at 10 mA g−1, which maintains 100 mAh g−1 at 1 A g−1 and has a cycling stability of 96% of initial capacity after 400 cycles, thereby outperforming both neat LTO and LTO with onions obtained via vacuum treatment. The performance of the best-performing hybrid material (LTO with carbon onions from argon annealing) in an SIB is tested, using 1 m NaClO4 in ethylene/dimethyl/fluoroethylene carbonate (19:19:2 by mass) as the electrolyte. A maximum capacity of 102 mAh g−1 for the SIB system is obtained, with a capacity retention of 96% after 500 cycles.

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Document Type:Article
Author:Hwirim Shim, Stefanie ArnoldORCiD, Öznil BudakORCiD, Maike UlbrichtORCiD, Pattarachai SrimukORCiD, Volker PresserORCiD
Parent Title (English):Energy Technology
First Page:2000679
Year of first Publication:2020
Release Date:2022/11/18
Impact:03.631 (2020)
Funding Information:Bundesministerium für Wirtschaft und Energie (03ET6113C)
Research Groups:Energy Materials
Open Access:Open Access
Signature:INM 2020/103
Licence (German):License LogoCreative Commons - CC BY - Namensnennung 4.0 International