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无机材料学报

无机材料学报 ›› 2023, Vol. 38 ›› Issue (12): 1427-1433.DOI: 10.15541/jim20230142

所属专题： 【信息功能】敏感陶瓷（202312）； 【信息功能】电致变色与热致变色材料(202312)

• 研究论文 • 上一篇    下一篇

多孔NiMoO4纳米片薄膜的直接水热生长及其电致变色性能

牛海滨(), 黄佳慧, 李倩文, 马董云(), 王金敏()   

  1. 上海理工大学 材料与化学学院, 上海 200093
  • 收稿日期:2023-03-20 修回日期:2023-04-04 出版日期:2023-08-31 网络出版日期:2023-08-31
  • 通讯作者: 王金敏, 教授. E-mail: jmwang@usst.edu.cn;
    马董云, 讲师. E-mail: dyma@usst.edu.cn
  • 作者简介:牛海滨(1995-), 男, 硕士研究生. E-mail: 202242296@st.usst.edu.cn
  • 基金资助:
    国家自然科学基金(62275154)

Directly Hydrothermal Growth and Electrochromic Properties of Porous NiMoO4 Nanosheet Films

NIU Haibin(), HUANG Jiahui, LI Qianwen, MA Dongyun(), WANG Jinmin()   

  1. University of Shanghai for Science and Technology, School of Materials and Chemistry, Shanghai 200093, China
  • Received:2023-03-20 Revised:2023-04-04 Published:2023-08-31 Online:2023-08-31
  • Contact: WANG Jinmin, professor. E-mail: jmwang@usst.edu.cn;
    MA Dongyun, lecturer. E-mail: dyma@usst.edu.cn
  • About author:NIU Haibin (1995-), male, Master candidate. E-mail: 202242296@st.usst.edu.cn
  • Supported by:
    National Natural Science Foundation of China(62275154)

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摘要：

钼酸镍(NiMoO4)是一种在储能和催化领域具有优异性能的材料, 但在电致变色领域还缺乏深入探索研究。本研究未使用晶种层, 采用水热法在透明导电玻璃基底上生长了多孔NiMoO4薄膜。采用掠入射X射线衍射仪(GIXRD)、场发射扫描电子显微镜(FESEM)对NiMoO4纳米片薄膜样品的晶相和微观形貌进行了表征, 并研究了NiMoO4薄膜的电化学性能和电致变色性能。结果表明: NiMoO4电致变色薄膜具有多孔结构, 能够为离子迁移提供充足的通道和反应活性位点。因此, NiMoO4薄膜表现出优异的电致变色性能, 其光调制幅度达到79.6%, 着色效率为86.2 cm2·C-1, 着色和褪色时间分别为9.5和12.7 s(在褪色过程存在一个快速和一个慢速步骤), 经过100次着色和褪色循环后光调制幅度仍可以保持最大光调制幅度的99.7%。此外, 该薄膜在0.3 mA·cm-2的电流密度下的面积比电容高达49.59 mF·cm-2。上述优异的性能使NiMoO4纳米片薄膜有望在高性能电致变色器件中得到重要应用。在器件的组装过程中, 探索合适的电解质以及与NiMoO4薄膜相匹配的对电极将是下一步研究工作的重点。

关键词: NiMoO4, 电致变色, 纳米片, 水热法

Abstract:

Nickel molybdate (NiMoO4) is a material with excellent performance in the field of energy storage and catalysis, but lacking of further explorations in the field of electrochromism. In this work, porous NiMoO4 films were grown on transparent conductive glasses by hydrothermal method without using seed layer. Crystalline phase and micromorphology of NiMoO4 nanosheet films were characterized by grazing incidence X-ray diffractometer (GIXRD) and field-emission scanning electron microscope (FESEM), and the electrochromic and electrochemical properties were also investigated by using a UV-Vis-NIR spectrophotometer and an electrochemical workstation. The results show that the NiMoO4 electrochromic films have a porous structure, which can provide sufficient channels for ion migration and reactive sites for the dynamic process of ion intercalation/deintercalation into NiMoO4 film. Therefore, the NiMoO4 films exhibit excellent electrochromic performance, including large optical modulation of 79.6% at 480 nm and high coloring efficiency of 86.2 cm2·C-1. Meanwhile, the coloration and bleaching response time of the NiMoO4 films are 9.5 and 12.7 s, respectively. Interestingly, there is a two-step process in the bleached process of NiMoO4 electrochromic films, including a fast process and a slow process. And the optical modulation can still be maintained at 99.7% of the maximum optical modulation after 100 cycles. In addition, the NiMoO4 films exhibit a large area specific capacitance of 49.59 mF·cm-2 at 0.3 mA·cm-2. These excellent properties support NiMoO4 nanosheet films with promising application in high-performance electrochromic devices. And the next step is to focus on finding the suitable electrolyte and matched counter electrodes in the device assembly.

Key words: NiMoO4, electrochromic, nanosheet, hydrothermal method

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