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Cheng Y, Pan Z, Bai H, Chen H, Yao L, Ding X, Shi S, Liu J, Xie Z, Xu J, Zhai J. Two-Dimensional Fillers Induced Superior Electrostatic Energy Storage Performance in Trilayered Architecture Nanocomposites. ACS APPLIED MATERIALS & INTERFACES 2022; 14:8448-8457. [PMID: 35129328 DOI: 10.1021/acsami.1c23086] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Dielectric capacitors with ultrahigh power densities and fast charging/discharging rates are of vital relevance in advanced electronic markets. Nevertheless, a tradeoff always exists between breakdown strength and polarization, which are two essential elements determining the energy storage density. Herein, a novel trilayered architecture composite film, which combines outer layers of two-dimensional (2D) BNNS/poly(vinylidene fluoride-co-hexafluoropropylene) (P(VDF-HFP)) with high breakdown strength and an intermediate layer made of blended 2D MoS2 nanosheets/P(VDF-HFP) with large polarization, is fabricated using the layer-by-layer casting method. The insulating BNNS with a wide band gap is able to largely alleviate the distortion of the local electric field, thereby suppressing the leakage current and effectively reducing the conductivity loss, while the 2D MoS2 nanosheets act as microcapacitors in the polymer composites, thus significantly increasing the permittivity. A finite element simulation is carried out to further analyze the evolution process of electrical treeing in the experimental breakdown of the polymer nanocomposites. Consequently, the nanocomposites possess an excellent discharged energy density of 25.03 J/cm3 accompanied with a high charging/discharging efficiency of 77.4% at 650 MV/m, which greatly exceeds those of most conventional single-layer films. In addition, the corresponding composites exhibit an outstanding reliability of energy storage performance under continuous cycling. The excellent performances of these polymer-based nanocomposite films could pave a way for widespread applications in advanced capacitors.
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Affiliation(s)
- Yu Cheng
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, Zhejiang, China
| | - Zhongbin Pan
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, Zhejiang, China
| | - Hairui Bai
- School of Materials Science & Engineering, Tongji University, 4800 Caoan Road, Shanghai 201804, China
| | - Hanxi Chen
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, Zhejiang, China
| | - Lingmin Yao
- School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, Guangdong, China
| | - Xiangping Ding
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, Zhejiang, China
| | - Songhan Shi
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, Zhejiang, China
| | - Jinjun Liu
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, Zhejiang, China
| | - Zhaoyang Xie
- School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, Guangdong, China
| | - Jingkun Xu
- Flexible Electronics Innovation Institute, Jiangxi Science and Technology Normal University, Nanchang 330013, China
| | - Jiwei Zhai
- School of Materials Science & Engineering, Tongji University, 4800 Caoan Road, Shanghai 201804, China
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