A novel high capacity, environmentally benign energy storage system: Super-iron boride battery
✍ Scribed by Xingwen Yu; Stuart Licht
- Publisher
- Elsevier Science
- Year
- 2008
- Tongue
- English
- Weight
- 605 KB
- Volume
- 179
- Category
- Article
- ISSN
- 0378-7753
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✦ Synopsis
High electrochemical capacity of alkaline boride anodes is presented. The alkaline anodes based on transition metal borides (demonstrated with TaB, TaB 2 , TiB 2 and VB 2 ) can deliver exceptionally high discharge capacity. Over 2000 and 3800 mAh g -1 discharge capacities are obtained for the commercially available TiB 2 and VB 2 respectively, much higher than the theoretical capacity of commonly used zinc metal (820 mAh g -1 ) alkaline anode. Coupling with the super-iron cathodes, the novel Fe 6+ /B 2-battery chemistry generates a matched electrochemical potential to the conventional MnO 2 -Zn battery, but sustains a much higher electrochemical capacity. High capacity TiB 2 and VB 2 anodes are further studied by coupling with a variety of cathodes (such as MnO 2 , NiOOH, KIO 4 and composite K 2 FeO 4 /AgO). Both TiB 2 and VB 2 show good compatibilities with each of these cathodes. With the additive AgO to the super-iron (K 2 FeO 4 ) cathode, a K 2 FeO 4 /AgO composite cathode TiB 2 anode alkaline battery exhibits high-rate discharge performance.