The Room-Temperature Superionic Conductivity of Silver Iodide Nanoparticles under Pressure
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- 作者：Takayuki Yamamoto ; Mitsuhiko Maesato ; Naohisa Hirao ; Saori I. Kawaguchi ; Shogo Kawaguchi ; Yasuo Ohishi ; Yoshiki Kubota ; Hirokazu Kobayashi ; Hiroshi Kitagawa
- 刊名：Journal of the American Chemical Society
- 出版年：2017
- 出版时间：February 1, 2017
- 年：2017
- 卷：139
- 期：4
- 页码：1392-1395
- 全文大小：336K
- ISSN：1520-5126
文摘
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.