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A Review: Enhanced Anodes of Li/Na-Ion Batteries Based on yolk–shell structured Nanomaterials

Nano-Micro Letters 2018年第3期10卷 24-41页

作者： Cuo Wu Xin Tong Yuanfei Ai De-Sheng Liu Peng Yu Jiang Wu Zhiming M.Wang Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China Department of Electronic and Electrical Engineering University College London

Lithium-ion batteries(LIBs) and sodium-ion batteries(SIBs) have received much attention in energy storage system. In particular, among the great efforts on enhancing the performance of LIBs and SIBs, yolk–shell(YS) structured materials have emerged as a promising strategy toward improving lithium and sodium storage. YS structures possess unique interior void space, large surface area and short diffusion distance, which can solve the problems of volume expansion and aggregation of anode materials, thus enhancing the performance of LIBs and SIBs. In this review, we present a brief overview of recent advances in the novel YS structures of spheres, polyhedrons and rods with controllable morphology and compositions. Enhanced electrochemical performance of LIBs and SIBs based on these novel YS structured anode materials was discussed in detail.

关键词： yolk–shell structure Lithium-ion batteries Sodium-ion batteries

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Design and Synthesis of Cu@CuS yolk–shell structures with Enhanced Photocatalytic Activity

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Nano-Micro Letters 2017年第3期9卷 109-117页

作者： Qiuyan Li Fan Wang Linqiang Sun Zhe Jiang Tingting Ye Meng Chen Qiang Bai Chao Wang Xiguang Han Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials Department of Chemistry School of Chemistry and Chemical Engineering Jiangsu Normal University College of Materials Science and Engineering Qingdao University of Science and Technology

Non-spherical Cu@Cu S yolk–shell structures are successfully obtained using Cu_2 O cube templates in a process combining rapid surface sulfidation followed by disproportionation of the Cu_2 O core upon treatment with a hydrochloric acid solution. By employing the above method,Cu@Cu S yolk–shell structures with different morphologies,including octahedral, truncated octahedral, and cuboctahedral shapes, can be synthesized. The void space within the hollow structures provides a unique confined space, where the metallic copper present in the core of a shell can be protected from agglomeration and oxidation. Furthermore,the presence of metal copper in these hollow structurescontributes to improvement in the photocatalytic properties of these materials. The application of these Cu@Cu S structures indeed shows clearly improved photocatalytic performance.

关键词： Nanomaterial yolk–shell structure Cu@CuS Photocatalysis

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Encapsulating metal organic framework into hollow mesoporous carbon sphere as efficient oxygen bifunctional electrocatalyst

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National Science Review 2020年第3期7卷 609-619页

作者： Wanfeng Xiong Hongfang Li Hanhui You Minna Cao Rong Cao State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences College of Chemistry and Materials Science Fujian Normal University

Applying metal organic frameworks(MOFs) in electrochemical systems is a currently emerging field owing to the rich metal nodes and highly specific surface area of MOFs. However, the problems for MOFs that need to be solved urgently are poor electrical conductivity and low ion transport. Here we present a facile in situ growth method for the rational synthesis of MOFs@hollow mesoporous carbon spheres(HMCS)yolk–shell-structured hybrid material for the first time. The size of the encapsulated Zeolitic Imidazolate Framework-67(ZIF-67) is well controlled to 100 nm due to the spatial confinement effect of HMCS, and the electrical conductivity of ZIF-67 is also increased significantly. The ZIF@HMCS-25% hybrid material obtained exhibits a highly efficient oxygen reduction reaction activity with 0.823 V(vs. reversible hydrogen electrode) half-wave potential and an even higher kinetic current density(JK= 13.8 m A cm-2) than commercial Pt/C. ZIF@HMCS-25% also displays excellent oxygen evolution reaction performance and the overpotential of ZIF@HMCS-25% at 10 m A cm-2 is 407 m V. In addition, ZIF@HMCS-25% is further employed as an air electrode for a rechargeable Zn–air battery, exhibiting a high power density(120.2 m W cm-2 at 171.4 m A cm-2) and long-term charge/discharge stability(80 h at 5 m A cm-2). This MOFs@HMCS yolk–shell design provides a versatile method for the application of MOFs as electrocatalysts directly.

关键词： metal organic frameworks yolk–shell structure bifunctional electrocatalyst Zn–air battery

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Facile Approach to Synthesize Gold Nanorod@Polyacrylic Acid/Calcium Phosphate yolk–shell Nanoparticles for Dual-Mode Imaging and pH/NIR-Responsive Drug Delivery

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Nano-Micro Letters 2018年第1期10卷 63-73页

作者： Guilan Li Yidan Chen Lingyu Zhang Manjie Zhang Shengnan Li Lu Li Tingting Wang Chungang Wang Faculty of Chemistry Northeast Normal University School of Chemistry and Environmental Engineering Changchun University of Science and Technology

A facile strategy to fabricate gold nanorod@polyacrylic acid/calcium phosphate(Au NR@-PAA/Ca P) yolk–shell nanoparticles(NPs) composed with a PAA/Ca P shell and an Au NR yolk is reported. The asobtained Au NR@PAA/Ca P yolk–shell NPs possess ultrahigh doxorubicin(DOX) loading capability(1 mg DOX/mg NPs), superior photothermal conversion property(26%)and p H/near-infrared(NIR) dual-responsive drug delivery performance. The released DOX continuously increased due to the damage of the Ca P shell at low p H values. When the DOX-loaded Au NR@PAA/Ca P yolk–shell NPs wereexposed to NIR irradiation, a burst-like drug release occurs owing to the heat produced by the Au NRs. Furthermore,Au NR@PAA/Ca P yolk–shell NPs are successfully employed for synergic dual-mode X-ray computed tomography/photoacoustic imaging and chemo-photothermal cancer therapy. Therefore, this work brings new insights for the synthesis of multifunctional nanomaterials and extends theranostic applications.

关键词： yolk–shell structure Calcium phosphate Dual-mode imaging Photothermal therapy Drug delivery

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