摘要
The polyoxometalates-based electrochromic energy storage devices(POMs-EESDs)were constructed using P2W17O6111coated TiO_(2)as the working electrode and MnO_(2)film as the counter electrode.The MnO_(2)films with different thicknesses acted as the charge balancing layer.The device showed bifunctional of enhanced EC and energy storage properties along with high durability and cycle stabilities after the introduction of MnO_(2)film.The optimistic thickness of MnO_(2)was found to be 345 nm through balancing the optical modulation and the energy storage properties.For the EC aspect,the optical contrast was enhanced by four times under the potential step of2.0/1.0 V.The MnO_(2)film also introduces high capacitance leading to the device can be used as a transparent capacitor.It is the first time to construct high-performance POMs-based EESD only by introducing a simple charge balancing(MnO_(2))layer in the device.Moreover,the mechanism of the MnO_(2)layer towards the performance improvement of the POMs-based EESDs was also explained.
基金
Revitalization Talents Program(XLYC2007060),Liaoning province science and Technology Department Program(2022-MS-175)
and the Scientific research foundation of the Department of Education of Liaoning Province(LFW201904 and LJC202004)for financial support of this work.
