Article
Materials Science, Ceramics
Zhengyi Yang, Zhu Qing, Enzhu Li, Bin Tang, Ying Yuan
Summary: This study introduces a novel microwave composite substrate material consisting of dopamine-modified boron nitride nanosheets and SrTiO3/polyolefin. The composite material exhibits high dielectric constant and remarkable thermal conductivity, along with good compatibility and mechanical properties.
CERAMICS INTERNATIONAL
(2023)
Review
Materials Science, Multidisciplinary
Lulu An, Yuanlie Yu, Qiran Cai, Srikanth Mateti, Lu Hua Li, Ying Ian Chen
Summary: The urgent need for ultrahigh thermally conductive materials in the electronics industry has led to the exploration of hexagonal boron nitride nano-sheets (BNNSs) as an ideal choice. This article provides a comprehensive review of various fabrication methods for BNNSs, discusses the impact of BNNS properties on their thermally conductive properties, and explores the use of BNNSs as fillers in polymer-based materials. The aim of this review is to inspire new fabrication methods and improvements for BNNS/polymer composites and promote their practical application as thermal transport/dissipation materials.
PROGRESS IN MATERIALS SCIENCE
(2023)
Article
Materials Science, Ceramics
Ke Zhao, Siyu Wei, Meng Wang, Yingbo Chen
Summary: This study investigates polymer composite materials that combine high thermal conductivity and low permittivity, using ultrasonically exfoliated alkylated boron nitride nanosheets (Alkyl-BNNS) that have strong non-covalent interactions with polymer chains. The obtained composites exhibit excellent performance in thermal conductivity and dielectric constant, and also have advantages in thermal management capability, low water absorption, favorable electrical resistance, and prominent tensile strength. These composite materials are expected to be ideal candidates in the field of microelectronics.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Composites
Rui Mo, Zhongjie Liu, Wenyao Guo, Xinfeng Wu, Qunjie Xu, Yulin Min, Jinchen Fan, Jinhong Yu
Summary: By innovatively using the interfacial crosslinking approach, the performance of boron nitride nanosheets/carbon nanotubes composites was effectively enhanced, including improved thermal conductivity and mechanical properties.
COMPOSITES COMMUNICATIONS
(2021)
Article
Materials Science, Composites
XingXing Yu, Mingshan Xue, Zuozhu Yin, Yidan Luo, Zhen Hong, Chan Xie, Yingbin Yang, Zeming Ren
Summary: This study successfully prepared a flexible boron nitride composite membrane with high thermal conductivity, low dielectric constant, and facile mass production. By the directional arrangement of 2D boron nitride nanosheets, the heat diffused along the in-plane direction, resulting in a high thermal conductivity of 81.49 Wm(-1)K(-1). Additionally, the composite membrane exhibited good electrical insulation, low dielectric constant, and low dielectric loss.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Quzhi Song, Bing Wang, Wei Li, Wenjun Liu, Shuang Wu, Yiang Du, Yingde Wang
Summary: High-performance hydroxyl and amino bifunctionalized boron nitride nanosheets (HA-BNNSs) with excellent dispersity and high aspect ratio were successfully prepared by citric acid-assisted ball milling method. The HA-BNNSs were introduced into aramid nanofibers to fabricate composite films with improved mechanical strength and thermal conductivity at a relatively low filler content.
ACS APPLIED NANO MATERIALS
(2022)
Article
Materials Science, Composites
Chuxin Lei, Yongzheng Zhang, Dingyao Liu, Xuran Xu, Kai Wu, Qiang Fu
Summary: In this study, high thermal conductivity regenerated cellulose/boron nitride nanosheets filaments were prepared via wet-spinning method, and a tailored polydimethylsiloxane/regenerated cellulose/boron nitride nanosheets filaments nanocomposite with hierarchical assembled architectures was successfully fabricated. This nanocomposite provides effective solutions to the thickness-direction heat transfer issues of electronic devices, with tactfully engineered phonon pathways resulting in remarkable through-plane thermal conductivity performance.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Composites
Zilong Xie, Kai Wu, Dingyao Liu, Qin Zhang, Qiang Fu
Summary: This study presents a low-loading polypropylene nanocomposites with uniformly-dispersed and interfacial engineered boron nitride nanosheets, which exhibit significantly enhanced thermal conductivity of 2.74 W/m.K and remarkably low dielectric loss of only 0.002. The strong interfacial noncovalent interactions between BNNS and macromolecular chain suppress the interfacial polarization, while the well-maintained hexagonal crystalline lattice of BNNS promises efficient phonon transmission. These thermal and dielectric performances outperform most previously reported thermoconductive polymer-based dielectrics, and the material also offers excellent electric breakdown strength, flexibility, and stretchability, providing a promising avenue for fabricating thermo-conductive dielectrics with low dielectric loss.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Physical
Wei Yang, Yingqing Zhan, Qingying Feng, Ao Sun, Hongyu Dong
Summary: In this work, a low dielectric constant and high thermal conductivity poly (arylene ether nitrile) (PEN) fibrous composite film was successfully prepared using coaxial electrospinning hot-pressing technique. By rational design of the material structure, the fibrous composite film exhibited low dielectric constant, low dielectric loss, and high thermal conductivity.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Materials Science, Composites
Fan Su, Ling Zhang, Chunzhong Li
Summary: A novel low-cost thermal conductive composite consisting of BN/Al2O3 heat transfer network was constructed by high packing volume fraction of two sizes Al2O3 spheres. The composite exhibited excellent thermal conductivity and heat dissipation capacity, making it suitable for electronic components in the new generation of microelectronic devices.
POLYMER COMPOSITES
(2021)
Review
Materials Science, Composites
Dinesh Ramesh Salunke, Venkatachalam Gopalan
Summary: This paper examines recent developments in highly thermal conductive epoxy-based polymer composites, focusing on composite materials, thermal conductivity of polymer types, and thermal and electric properties of composites with boron nitride. The review also addresses challenges and the need for further development in thermal conductive polymer materials.
POLYMER COMPOSITES
(2021)
Article
Polymer Science
Qianyu Song, Mengqiu Wang, Yiming Lai, Qihong Wang, Xiangyu Yin, Linxi Hou
Summary: By filling commercial polyimides with aramid nanofibers connection nitrides, the thermal conductivity of polyimide is improved while maintaining excellent dielectric performance, providing new insights for its application in electronic packaging.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Ruiyi Li, Xiao Yang, Jian Li, Ding Liu, Lixin Zhang, Haisheng Chen, Xinghua Zheng, Ting Zhang
Summary: In this study, boron nitride nanosheets (BNNS) filled composite films were prepared by ball milling, and the thermal conductivity, breakdown strength, and mechanical properties were studied. After pre-ball milling, the in-plane thermal conductivity of the composite film decreased, but the through-plane thermal conductivity increased, and the breakdown strength and tensile strength were also improved. Additionally, the composite film, serving as a flexible circuit substrate, exhibited a lower working temperature compared to pure films.
Article
Engineering, Environmental
Yueyang Gao, Minghang Zhang, Xinran Chen, Yanji Zhu, Huaiyuan Wang, Sicheng Yuan, Fei Xu, Yexiang Cui, Di Bao, Xiaosong Shen, Yue Sun, Jianwen Peng, Yixi Zhou, Meng Zhang
Summary: This study introduces an efficient and scalable technique to enhance the thermal conductivity and efficiency of polymer-based composites by forming a robust neuron-like microstructure network with oriented boron nitride platelets. The composite shows promising prospects in various applications due to its high thermal conductivity, thermal enhancement efficiency, electrical resistivity, and usage stability.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Multidisciplinary Sciences
Zhenzhen Ou, Feng Gao, Lingjian Zhu, Huaijun Zhao, Zihan Xun
Summary: An electric-insulated heat-conducted material with specific properties has been studied and its practicality has been proven through experiments. By optimizing the filler fraction and working conditions, the best ratio has been determined for high voltage power encapsulation.
Article
Chemistry, Multidisciplinary
Cheng Dai, Vladimir Alexandru Stoica, Sujit Das, Zijian Hong, Lane W. Martin, Ramamoorthy Ramesh, John W. Freeland, Haidan Wen, Venkatraman Gopalan, Long-Qing Chen
Summary: This article discusses the phase transitions and domain evolutions of mesoscale topological structures in ferroic materials and investigates the behaviors of a supercrystal through experiments and simulations. The results demonstrate the potential for on-demand manipulation of the polar topology and transformations in supercrystals using electric fields.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Yiqian Liu, Junfu Liu, Hao Pan, Xiaoxing Cheng, Zijian Hong, Ben Xu, Long-Qing Chen, Ce-Wen Nan, Yuan-Hua Lin
Summary: In this study, a new approach of domain engineering is proposed by exploiting the tunable polar topologies in ferroelectric/paraelectric multilayer films. By tailoring the strain state and layer thickness, various polar topologies and switching dynamics are realized, leading to high energy-storage densities and efficiencies.
ADVANCED MATERIALS
(2022)
Article
Multidisciplinary Sciences
Xin Chen, Hancheng Qin, Xiaoshi Qian, Wenyi Zhu, Bo Li, Bing Zhang, Wenchang Lu, Ruipeng Li, Shihai Zhang, Lei Zhu, Fabrice Domingues Dos Santos, J. Bernholc, Q. M. Zhang
Summary: Introducing a small amount of fluorinated alkyne monomers enhances the polarization change in ferroelectric polymers, leading to a strong electromechanical coupling effect.
Article
Chemistry, Physical
Yuhang Ren, Hongbo Cheng, Jun Ouyang, Onur Kurt, Jianjun Wang, Qinghua Zhang, Yuyao Zhao, Lin Gu, Long-Qing Chen
Summary: A lead-free, simple composition of Ba(Zr,Ti)O-3 has been found to exhibit a pseudo-linear, ultra-slim polarization-electric field hysteresis loop, with a high energy efficiency of up to 90%. This is attributed to the presence of self-assembled, bimodal polymorphic nanodomains, which reduce the remnant polarization and delay polarization saturation. The strain engineering of these nanodomain structures provides a promising alternative to chemical compositional design for optimizing dielectric thin films.
ENERGY STORAGE MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Yanzhou Ji, Long-Qing Chen
Summary: This paper introduces a phase-field model for predicting microstructure patterns of multiphase solids with fixed compositions and variable chemical compositions. The existing phase-field models are inaccurate in treating ordered stoichiometric compounds, and this paper proposes a new framework for more accurate predictions of microstructures.
Article
Chemistry, Physical
Qian Cheng, Tianwei Jin, Yupeng Miao, Zhe Liu, James Borovilas, Hanrui Zhang, Shuwei Liu, So-Yeon Kim, Ruiwen Zhang, Haozhen Wang, Xi Chen, Long-Qing Chen, Ju Li, Wei Min, Yuan Yang
Summary: In solid polymer electrolytes, concentration polarization can induce phase transformation, leading to the formation of a mechanically rigid PEO-rich phase, effectively suppressing the growth of lithium whiskers.
Article
Chemistry, Multidisciplinary
Wenying Zhou, Guozheng Cao, Mengxue Yuan, Shaolong Zhong, Yandong Wang, Xiangrong Liu, Dan Cao, Weiwei Peng, Jing Liu, Guangheng Wang, Zhi-Min Dang, Bo Li
Summary: In this study, the polarization mechanism of polymer conductor composites is investigated, revealing that it is determined by electron transport across multiple neighboring conductive fillers. By optimizing the filler-cluster size, a novel percolative composite with high dielectric constant and low loss is prepared.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Suji Park, Bo Wang, Tiannan Yang, Jieun Kim, Sahar Saremi, Wenbo Zhao, Burak Guzelturk, Aditya Sood, Clara Nyby, Marc Zajac, Xiaozhe Shen, Michael Kozina, Alexander H. Reid, Stephen Weathersby, Xijie Wang, Lane W. Martin, Long-Qing Chen, Aaron M. Lindenberg
Summary: This study presents the first investigation on the ultrafast dynamics and reconfigurability of polarization in freestanding films of a typical relaxor ferroelectric using femtosecond-resolution electron-scattering techniques. The results demonstrate that femtosecond light pulses can induce changes in both the magnitude and direction of the polarization vector within polar nanodomains on a picosecond time scale. These findings offer new possibilities for dynamically reconfigurable control of polarization in nanoscale relaxor ferroelectrics.
Article
Chemistry, Physical
He Li, Boyce S. Chang, Hyunseok Kim, Zongliang Xie, Antione Laine, Le Ma, Tianlei Xu, Chongqing Yang, Junpyo Kwon, Steve W. Shelton, Liana M. Klivansky, Virginia Altoe, Bing Gao, Adam M. Schwartzberg, Zongren Peng, Robert O. Ritchie, Ting Xu, Miquel Salmeron, Ricardo Ruiz, K. Barry Sharpless, Peng Wu, Yi Liu
Summary: Designing high-capacity polymer dielectrics that can operate efficiently under harsh electrical conditions is challenging. However, polysulfates synthesized through SuFEx catalysis were found to be high-performing dielectric polymers that can overcome these challenges. Free-standing polysulfate thin films exhibit superior insulating properties and dielectric stability at high temperatures, which can be further improved with ultrathin oxide coatings. These advancements lead to electrostatic film capacitors with high breakdown strength and discharged energy density, outperforming current state-of-the-art dielectric materials.
Article
Physics, Applied
Zongliang Xie, Xi Pang, Tianlei Xu, Peng Liu, Dingxin Wei, Jingxin Wang, Zehua Wu, He Li, Zongren Peng
Summary: The use of direct current gas insulated transmission line (DC GIL) technique shows promise in achieving carbon neutrality and enabling efficient long-distance transmission of renewable energy. However, the challenge lies in finding insulating materials that can overcome charge accumulation issues in the presence of multiple fields. In this study, the space charge dynamics and electrical conductivity of epoxy resin and EP/micro-Al2O3 composites were investigated under various electrical, thermal, and mechanical stresses. The findings suggest that stronger electric fields and higher temperature conditions have a more significant impact on space charge accumulation, while higher mechanical stress results in more shallow traps in the composites. Bipolar carrier transport modeling and numerical calculations were performed to explain the experimental observations and understand the mechanistic impacts of multi-physical fields on the space charge behavior of the composites for DC GIL insulator use.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Hongjian Zhang, Yiqun Wu, Wenting Jin, Wen Chen, Yong Zhang
Summary: A sandwich-structured composite-type piezoelectric energy harvesting device using barium titanate nanoparticles and P(VDF-TrFE) copolymers matrix is reported for high-output mechanical energy harvesting. By modulating the distribution of piezoelectric nanoparticles in the polymer matrix, the device achieved the highest open-circuit voltage of -60 V and power density of -65 mu W/cm3 at a load resistance of 50 M omega. The improved energy harvesting capability is attributed to the stress-enforcement in embedded piezoelectric nanoparticles and optimized piezoelectric response.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Polymer Science
Yanqing Zhang, Wenying Zhou, Weiwei Peng, Tian Yao, Yang Zhang, Bo Wang, Huiwu Cai, Bo Li
Summary: In this study, core@double-shell structured dielectric composites with high dielectric permittivity and low loss were prepared by constructing Zn@ZnCH@PS particles and modifying the shell's thickness and electrical properties. The double-shell design induced and promoted multiple polarizations, enhancing the composites' dielectric permittivity while maintaining suppressed loss and conductivity. This research provides a convenient method for developing polymer composites with desirable dielectric properties for electronic and electrical power systems.
MACROMOLECULAR RAPID COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Zhiyang Wang, Long-Qing Chen
Summary: This study reports the formation of polar skyrmion crystals with two-dimensional hexagonal symmetry in PbTiO3/SrTrO3 superlattices. A temperature-electric field topological phase diagram is constructed to demonstrate the stabilization of polar skyrmion crystals. The research shows the potential of manipulating topological phase transitions and long-range order through external fields.
Article
Chemistry, Physical
He Li, Zongliang Xie, Chongqing Yang, Junpyo Kwon, Antoine Laine, Chaochao Dun, Alexander V. Galoustian, Xinle Li, Peng Liu, Jeffrey J. Urban, Zongren Peng, Miquel Salmeron, Robert O. Ritchie, Ting Xu, Yi Liu
Summary: In this study, we improved the electrical insulating and mechanical strengths of soft polymer films by introducing rigid covalent organic framework (COF) nanospheres. The resulting all-organic thin films exhibit high dielectric constant, enhanced breakdown strength, superior energy density, and excellent mechanical flexibility, demonstrating the potential of COF for flexible electronic applications operating under high electric fields.
Article
Multidisciplinary Sciences
Emma Vargo, Le Ma, He Li, Qingteng Zhang, Junpyo Kwon, Katherine M. Evans, Xiaochen Tang, Victoria L. Tovmasyan, Jasmine Jan, Ana C. Arias, Hugo Destaillats, Ivan Kuzmenko, Jan Ilavsky, Wei-Ren Chen, William Heller, Robert O. Ritchie, Yi Liu, Ting Xu
Summary: Nanomaterials must be systematically designed to be technologically viable. Current designs are too rigid and cannot accommodate new chemical functionalities or address differences during integration. Shifting to entropy-driven assemblies and programming nanomaterial growth can provide design flexibility and address these limitations.