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- Title
Dendritic Nanostructured Waste Copper Wires for High-Energy Alkaline Battery.
- Authors
Chodankar, Nilesh R.; Ji, Su-Hyeon; Han, Young-Kyu; Kim, Do-Heyoung
- Abstract
Highlights: Electronic waste Cu wires were successfully used as a cost-effective current collector for high-energy wire-type rechargeable alkaline batteries. The scalable approach was applied to reduce, reuse, and recycle electronic waste. A developed wire-type rechargeable alkaline battery exhibited a high-energy-density of 82.42 Wh kg−1 with long-term cycling stability. Rechargeable alkaline batteries (RABs) have received remarkable attention in the past decade for their high energy, low cost, safe operation, facile manufacture, and eco-friendly nature. To date, expensive electrode materials and current collectors were predominantly applied for RABs, which have limited their real-world efficacy. In the present work, we propose a scalable process to utilize electronic waste (e-waste) Cu wires as a cost-effective current collector for high-energy wire-type RABs. Initially, the vertically aligned CuO nanowires were prepared over the waste Cu wires via in situ alkaline corrosion. Then, both atomic-layer-deposited NiO and NiCo-hydroxide were applied to the CuO nanowires to form a uniform dendritic-structured NiCo-hydroxide/NiO/CuO/Cu electrode. When the prepared dendritic-structured electrode was applied to the RAB, it showed excellent electrochemical features, namely high-energy-density (82.42 Wh kg−1), excellent specific capacity (219 mAh g−1), and long-term cycling stability (94% capacity retention over 5000 cycles). The presented approach and material meet the requirements of a cost-effective, abundant, and highly efficient electrode for advanced eco-friendly RABs. More importantly, the present method provides an efficient path to recycle e-waste for value-added energy storage applications.
- Subjects
COPPER wire; ALKALINE batteries; ELECTRONIC waste; STORAGE batteries; ENERGY storage; WASTE recycling
- Publication
Nano-Micro Letters, 2020, Vol 12, Issue 1, pN.PAG
- ISSN
2311-6706
- Publication type
Article
- DOI
10.1007/s40820-019-0337-2