Abstract
Abstract In this paper, we report that Li can be stored in RuO 2 with an unusually high coulombic efficiency. The process involves three electrochemical steps: i) formation of a Ru/Li 2 O nanocomposite, ii) formation of a Li‐containing surface film, and iii) interfacial deposition of Li within the Ru/Li 2 O matrix. Corresponding to the storage of 5.6 mole of Li ions per mole of RuO 2 , a high capacity of 1130 mAh g –1 is achieved. Furthermore, virtually all inserted Li ions can be extracted, corresponding to a nearly 100 % coulombic efficiency at the first cycle. Achieving a complete reversibility for such a Li storage system through complex heterogeneous solid‐state electrochemical reactions is possible because of the formation of nanoscale Ru/Li 2 O during Li insertion and nano‐RuO 2 during Li extraction, in addition to the favorable transport properties of RuO 2 itself.
Keywords
Faraday efficiencyMaterials scienceElectrochemistryHomogeneousIonLithium (medication)Chemical engineeringNanocompositeNanoscopic scaleNanotechnologyPhysical chemistryElectrodeThermodynamicsOrganic chemistryChemistry
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Publication Info
- Year
- 2003
- Type
- article
- Volume
- 13
- Issue
- 8
- Pages
- 621-625
- Citations
- 596
- Access
- Closed
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Cite This
Palani Balaya,
Hong Li,
Lorenz Kienle
et al.
(2003).
Fully Reversible Homogeneous and Heterogeneous Li Storage in RuO<sub>2</sub> with High Capacity.
Advanced Functional Materials
, 13
(8)
, 621-625.
https://doi.org/10.1002/adfm.200304406
Identifiers
- DOI
- 10.1002/adfm.200304406