Lihua Wang

Qingdao University

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Xiaodong Han

Beijing University of Technology

Ze Zhang

Beijing University of Technology

Jianmei Lu

Soochow University

Qingfeng Xu

Soochow University

Jiao Teng

University of Science and Technology Beijing

Deli Kong

Forschungszentrum Jülich

William L. Farrar

National Cancer Institute

Yizhong Guo

China Guangzhou Analysis and Testing Center

Yan Lu

Ernst Ruska Centre

Jin Zou

University of Queensland

Cooperative Institutions

Chinese Academy of Sciences

294

Beijing University of Technology

166

Shanghai Jiao Tong University

118

University of Chinese Academy of Sciences

111

Soochow University

Central South University

Zhejiang University

Tsinghua University

Viasat (United States)

Huazhong University of Science and Technology

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Grain rotation mediated by grain boundary dislocations in nanocrystalline platinum

Nature Communications (2014)

Lihua Wang Jiao Teng Pan Liu Akihiko Hirata E. Ma

Grain rotation is a well-known phenomenon during high (homologous) temperature deformation and recrystallization of polycrystalline materials. In recent years, grain rotation has also been proposed as a plasticity mechanism at low temperatures (for example, room temperature for metals), especially for nanocrystalline grains with diameter d less than ~15 nm. Here, in tensile-loaded Pt thin films under a high-resolution transmission electron microscope, we show that the plasticity mechanism transitions from cross-grain dislocation glide in larger grains (d>6 nm) to a mode of coordinated rotation of multiple grains for grains with d<6 nm. The mechanism underlying the grain rotation is dislocation climb at the grain boundary, rather than grain boundary sliding or diffusional creep. Our atomic-scale images demonstrate directly that the evolution of the misorientation angle between neighbouring grains can be quantitatively accounted for by the change of the Frank–Bilby dislocation content in the grain boundary. Grain rotation is proposed as an active deformation mechanism in nanocrystalline metals at room temperature. Here, during in-situatomic scale experimentation, the authors observe that grains with a size <6 nm deform by coordinated rotation of multiple grains, associated with dislocation climb at grain boundaries.

Misorientation

Nanocrystalline material

Grain boundary strengthening

Deformation mechanism

Climb

Recrystallization (geology)

Grain Boundary Sliding

10.1038/ncomms5402

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Citations (385)

Boosted Li+ migration in LiPON electrolyte via introducing Ti-based bridge for solid-state thin film batteries

Journal of Power Sources (2023)

Weiguo Huang Jian Li Kun Wei Lihua Wang

10.1016/j.jpowsour.2023.233698

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Citations (4)

Supplementary Figure Legends 1-2 from 15-Deoxy-Δ12,14-Prostaglandin J2 Inhibits Transcriptional Activity of Estrogen Receptor-α via Covalent Modification of DNA-Binding Domain

Han‐Jong Kim Joon‐Young Kim Zhaojing Meng Lihua Wang Fa Liu

Supplementary Figure Legends 1-2 from 15-Deoxy-Δ12,14-Prostaglandin J2 Inhibits Transcriptional Activity of Estrogen Receptor-α via Covalent Modification of DNA-Binding Domain

10.1158/0008-5472.22366976.v1

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Renewed graphite for high-performance lithium-ion batteries: catalytic graphitization approach

Journal of Materials Science Materials in Electronics (2024)

Zhengyi Li Jian Li Lihua Wang

10.1007/s10854-024-12370-5

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Citations (2)

Regeneration of deactivated CeCo O2 catalyst by simple thermal treatment

Journal of Rare Earths (2019)

Yandi Cai Lihua Wang Shuohan Yu Jingfang Sun Baochun Liu

Thermal Treatment

Ammonium hydroxide

10.1016/j.jre.2019.12.007

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Citations (5)

Highly bright solid-state carbon dots for efficient anticounterfeiting

RSC Advances (2024)

Weihua Li Yuanyuan Han Lihua Wang Gurpreet Singh Selopal Xiaohan Wang

Highly bright solid-state C-dots for an efficient temperature-sensitive anticounterfeiting system.

Carbon fibers

10.1039/d3ra07235e

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Citations (2)

A safer, symmetric all-organic battery based on temperature-responsive polymers as both cathode and anode

Chemical Engineering Journal (2022)

Tengfei Li Lihua Wang Jian Li

SAFER

10.1016/j.cej.2022.136232

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Citations (13)

New twinning route in face-centered cubic nanocrystalline metals

Nature Communications (2017)

Lihua Wang Pengfei Guan Jiao Teng Pan Liu Dengke Chen

Abstract Twin nucleation in a face-centered cubic crystal is believed to be accomplished through the formation of twinning partial dislocations on consecutive atomic planes. Twinning should thus be highly unfavorable in face-centered cubic metals with high twin-fault energy barriers, such as Al, Ni, and Pt, but instead is often observed. Here, we report an in situ atomic-scale observation of twin nucleation in nanocrystalline Pt. Unlike the classical twinning route, deformation twinning initiated through the formation of two stacking faults separated by a single atomic layer, and proceeded with the emission of a partial dislocation in between these two stacking faults. Through this route, a three-layer twin was nucleated without a mandatory layer-by-layer twinning process. This route is facilitated by grain boundaries, abundant in nanocrystalline metals, that promote the nucleation of separated but closely spaced partial dislocations, thus enabling an effective bypassing of the high twin-fault energy barrier.

Nanocrystalline material

Stacking-fault energy

Cubic crystal system

Stacking fault

10.1038/s41467-017-02393-4

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Citations (133)

In-Situ Observation of Cooperative Grain Boundary Sliding and Migration in the Nano-Twinned Nanocrystalline-Au Thin-Films

SSRN Electronic Journal (2019)

Qizhen Li Lihua Wang Jiao Teng Xiaolu Pang Xiaodong Han

Using our homemade tensile device inside a transmission electron microscope, we in-situ investigated the deformation behaviours of the nano-twinned nanocrystalline Au thin-films with thickness of ~ 15 nm and average grain size of ~ 16 nm. Our extensive in-situ observation studies reveal that the deformation of the nano-twinned nanocrystalline Au thin-films was dominated by the cooperative grain boundary sliding and migration, which were rarely observed in the previous reports. Meanwhile, our statistic shows that the nano-twins tended to promote further stress-driven grain growth, and the promotion became more remarkable for the nano-twinned grains that were located at the crack tips.

Nanocrystalline material

10.2139/ssrn.3474455

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High-Performance Three-Dimensional Stacked Micro All-Solid-State Thin-Film Lithium-Ion Batteries Based on the Stress-Compensation Effect

X.R. Wu Lihua Wang W. Q. Gu Jian Wang Yonghe Zhuang

A novel all-solid-state thin-film lithium-ion battery (LIB) is presented to address the trade-off issue between the specific capacity and stabilities in a conventional LIB. Different from the conventional one, this LIB device consists of two same LIB components located at the front and back surfaces of the substrate respectively. These two LIB components form parallel connection by using the conductive through vias distributed in the substrate. Compared with the conventional one, this LIB device doubles the areal specific capacity. More importantly, due to the stress-compensation effect, this device effectively suppresses the stress induced by its volume changes resulting from the lithiation/delithiation processes and thermal expansion. Consequently, this device shows good cycling and thermal stabilities even when working at an industrial-grade high temperature of 125 oC. To further improve the specific capacity without sacrificing the stabilities, a three-dimensional stacked LIB is successfully realized by using this LIB device as the cell, in which each cell is parallelly connected by using the above-mentioned conductive through vias. This three-dimensional stacked LIB is experimentally demonstrated to obtain high specific capacity (79.9 μAh·cm-2) and good stabilities (69.3% of retained capacity after 100 cycles at 125 oC) simultaneously.

Quasi-solid

10.2139/ssrn.4514071

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