The electric field cavity array effect of 2D nano-sieves

Fan Xu; Yuke Li; Qing Zou; Yu Shuang He; Zijia Shen; Chen Li; Huijuan Zhang; Feipeng Wang; Jian Li; Yu Wang

doi:10.1038/s41467-022-35623-5

The electric field cavity array effect of 2D nano-sieves

Nat Commun. 2022 Dec 22;13(1):7887. doi: 10.1038/s41467-022-35623-5.

Authors

Fan Xu^#¹, Yuke Li^#², Qing Zou¹, Yu Shuang He¹, Zijia Shen¹, Chen Li¹, Huijuan Zhang³, Feipeng Wang¹, Jian Li¹, Yu Wang^{4

5}

Affiliations

¹ State Key Laboratory of Power Transmission Equipment & System Security and New Technology, and the School of Electrical Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, 400044, Chongqing City, P. R. China.
² Department of Chemistry and Centre for Scientific Modeling and Computation, Chinese University of Hong Kong, Shatin, Hong Kong, P. R. China.
³ The School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, 400044, Chongqing City, P. R. China.
⁴ State Key Laboratory of Power Transmission Equipment & System Security and New Technology, and the School of Electrical Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, 400044, Chongqing City, P. R. China. wangy@cqu.edu.cn.
⁵ The School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, 400044, Chongqing City, P. R. China. wangy@cqu.edu.cn.

^# Contributed equally.

Abstract

For the upsurge of high breakdown strength ([Formula: see text]), efficiency ([Formula: see text]), and discharge energy density ([Formula: see text]) of next-generation dielectrics, nanocomposites are the most promising candidates. However, the skillful regulation and application of nano-dielectrics have not been realized so far, because the mechanism of enhanced properties is still not explicitly apprehended. Here, we show that the electric field cavity array in the outer interface of nanosieve-substrate could modulate the potential distribution array and promote the flow of free charges to the hole, which works together with the intrinsic defect traps of active Co₃O₄ surface to trap and absorb high-energy carriers. The electric field and potential array could be regulated by the size and distribution of mesoporous in 2-dimensional nano-sieves. The poly(vinylidene fluoride-co-hexafluoropropylene)-based nanocomposites film exhibits an [Formula: see text] of 803 MV m^-1 with up to 80% enhancement, accompanied by high [Formula: see text] = 41.6 J cm^-3 and [Formula: see text]≈ 90%, outperforming the state-of-art nano-dielectrics. These findings enable deeper construction of nano-dielectrics and provide a different way to illustrate the intricate modification mechanism from macro to micro.