Journal
MATERIALS HORIZONS
Volume 6, Issue 3, Pages 571-579Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8mh01091a
Keywords
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Funding
- Fundamental Research Funds for the Central Universities [18D110308]
- NSF of China [51672043]
- MOE of China [111-2-04, IRT_16R13]
- STC of Shanghai [16JC1400700, 16XD1400100]
- SMEC [2017-01-07-00-03-E00055]
- Shanghai ChenGuang Program [15CG33]
- Shanghai Natural Science Foundation [16ZR1401500]
- Shanghai Sailing Program [16YF1400400]
- Young Elite Scientists Sponsorship Program by CAST [2017QNRC001]
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Nickel oxide (NiO) is a promising candidate in practical electrochromic (EC) applications owing to its low cost and neutral colored state. However, the co-influence of low electrical conductivity and small lattice spacing leads to the slow switching speed and poor coloration efficiency of NiO-based EC electrodes. In this study, novel hierarchical-porous NiO@C thin film electrodes are fabricated through two-step pyrolysis of Ni-MOF on FTO glass, and the electrochemical and electrochromic performance of the electrodes can be improved by the regulation of the carbon residues. As a result, the desired NiO@C EC electrodes with both good ion diffusion and electrical conductivity are achieved. The film electrode shows a fast switching speed (0.46 s for coloring/0.25 s for bleaching), high coloration efficiency (113.5 cm(2) C-1) and ultra-stable EC cycles (90.1% after 20000 cycles). Additionally, EC eyewear devices and digital displays are assembled to illustrate the feasibility of the material in wearable devices and smart electronics.
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