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The Room-Temperature Superionic Conductivity of Silver Iodide Nanoparticles under Pressure

2017; American Chemical Society; Volume: 139; Issue: 4 Linguagem: Inglês

10.1021/jacs.6b11379

1943-2984

Takayuki Yamamoto, Mitsuhiko Maesato, Naohisa Hirao, Saori I. Kawaguchi, Shogo Kawaguchi, Yasuo Ohishi, Yoshiki Kubota, Hirokazu Kobayashi, Hiroshi Kitagawa,

ZnO doping and properties

We performed variable-temperature synchrotron powder X-ray diffraction measurements and impedance spectroscopy under pressure for silver iodide (AgI) nanoparticles with a diameter of 11 nm. The superionic conducting α-phase of AgI nanoparticles was successfully stabilized down to at least 20 °C by applying a pressure of 0.18 GPa, whereas the transition temperature was 147 °C in bulk AgI at ambient pressure. To our knowledge, this is the first example of the α-phase of AgI existing stably at room temperature.