Enhanced electrochromic property of nickel hydroxide thin films prepared by anodic deposition

Journal Article · Wed Nov 30 23:00:00 EST 1994 · Journal of the Electrochemical Society; (United States)

DOI:https://doi.org/10.1149/1.2059350· OSTI ID:6604419

Chigane, Masaya; Ishikawa, Masami ^[1]

---

1. Osaka Municipal Technical Research Inst. (Japan). Dept. of Inorganic Chemistry

Nickel hydroxide and nickel oxide thin films have received much attention as electrochromic (EC) materials, particularly as the materials for a complementary counterlayer against an EC tungsten oxide layer in smart window systems. Nickel hydroxide thin films were prepared onto transparent conductive tin oxide (NESA) substrates by potentiostatic electrolysis of a nickel amine complex solution at various potentials (0.6 to 1.5 V vs. Ag/AgCl). Nickel hydroxide thin film (F0.7) obtained at relatively lower anodic potential (0.7 V) showed enhanced electrochromism between colorless and dark brown in a sodium borate buffer solution at pH 12; the absorption spectrum in the colored (oxidized) state was broadened in the visible and near-infrared region compared with the nickel hydroxide films prepared at the higher anodic potential (1.1 V). characterization of the films revealed that crystal structure of F0.7 is assigned to [alpha]-Ni(OH)[sub 2], and that its electrochromism is based on the reversible oxidation to hexagonal [gamma][sub 2]-2NiO[sub 2] [center dot] NiOOH structure. Composite nickel hydroxide film, i.e., by the electrolytic deposition at 1.1 V followed by that at 0.7 V, showed electrochromic property similar to F0.7 and its durability in repeated redox cycles were much improved in comparison with that of F0.7. Electrochromic properties in switching performance of this composite nickel hydroxide film were investigated.

• OSTI ID: 6604419
• Journal Information: Journal of the Electrochemical Society; (United States), Journal Name: Journal of the Electrochemical Society; (United States) Vol. 141:12; ISSN JESOAN; ISSN 0013-4651
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320106 -- Energy Conservation
Consumption
& Utilization-- Building Equipment-- (1987-)
36 MATERIALS SCIENCE
360606* -- Other Materials-- Physical Properties-- (1992-)
CHALCOGENIDES
COMPOSITE MATERIALS
DATA
DEPOSITION
ELECTRO-OPTICAL EFFECTS
ELECTROCHROMISM
ELECTRODEPOSITION
ELECTROLYSIS
ENERGY CONSERVATION
EXPERIMENTAL DATA
GLAZING MATERIALS
HYDROGEN COMPOUNDS
HYDROXIDES
INFORMATION
LYSIS
MATERIALS
NICKEL COMPOUNDS
NICKEL HYDROXIDES
NICKEL OXIDES
NUMERICAL DATA
OPENINGS
OXIDES
OXYGEN COMPOUNDS
PHASE STUDIES
SURFACE COATING
TRANSITION ELEMENT COMPOUNDS
WINDOWS