A high-performance electrochromic device assembled with hexagonal WO3 and NiO/PB composite nanosheet electrodes towards energy storage smart window
A high-performance electrochromic device assembled with hexagonal WO3 and NiO/PB composite nanosheet electrodes towards energy storage smart window
复制标题
一种由六方WO3和NiO/PB复合纳米片电极组装而成的高性能电致变色器件，用于储能智能窗
DOI：
10.1016/j.solmat.2019.110337
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发表时间：
2020-04-01
影响因子：
6.9
通讯作者：
Deng, Longjiang
中科院分区：
文献类型：
--
作者：
Pan, Jianbo;Zheng, Rongzong;Deng, Longjiang
通过氧化还原反应可以实现电致变色和能量交换的功能，这表明设计双功能电致变色储能装置（EESD）是可行的。本文通过在NiO纳米片表面负载普鲁士蓝（铁（III））六氰高铁酸盐（II）， PB)纳米颗粒制备了NiO/PB复合纳米片电极，同时采用新型赤藓糖醇辅助水热法制备了高性能WO3负极，并以NH4Cl为封盖剂。所设计的esd具有较大的光调制（在630 nm处为67.6%）、较高的显色效率（109.6 cm(2) C-1）、快速的切换速度（漂白/显色2.8/7.9 s）和较长的循环寿命（4000次循环后δ T剩余量为84.1%）。同时，在0 ~ +1.3 V的电位窗口内，esd也获得了极好的储能性能。令人印象深刻的是，esd在0.05 mA cm（-2）电流密度下表现出11.50 mF cm（-2）的高面电容，并且充放电过程可以重复至少4000次，并且衰减很小。因此，双功能esd具有很好的应用前景。
Functions of electrochromism and energy exchange can be achieved by redox reactions, which indicate designing a bi-functional electrochromic energy storage device (EESD) is feasible. In this paper, a NiO/PB composite nanosheet electrode was prepared via loading Prussian blue (iron (III) hexacyanoferrate (II), PB) nanoparticles on the surface of NiO nanosheets, meanwhile, a high-performance WO3 negative electrode was also prepared via novel erythritol-assisted hydrothermal method with NH4Cl used as capping agent. The designed EESD exhibited properties of large optical modulation (67.6% at 630 nm), high coloration efficiency (109.6 cm(2) C-1), fast switching speed (2.8/7.9 s for bleaching/coloration) and long cycle life (Delta T remaining was 84.1% after 4000 cycles). Meanwhile, the EESD also obtained attractive energy storage properties at a potential window from 0 to +1.3 V. Impressively, the EESD exhibited a high areal capacitance of 11.50 mF cm(-2) at current density of 0.05 mA cm(-2) and the process of charging/discharging can be repeated at least 4000 cycles with a little decay. Therefore, the bi-functional EESD exhibits high promising application prospect.