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| 1 | Recent advances of graphene-based materials for high-performance and new-concept supercapacitors显示文摘Supercapacitors, with ultrahigh power density, superior rate capability, long-term cyclability, and exceptional safety, are regarded as one highly competitive candidate of electrochemical energy storage devices,filling the gap between batteries and conventional capacitors. Despite of tremendous effort, elaborated screening of high-performance electrode materials, e.g., graphene, is still intensively required. In this review, we describe the most recent progress in the research and development of graphene-based materials for high-performance and new-concept supercapacitors for the targeted applications in next-generation and smart electronics. First, the design and fabrication of high-performance supercapacitors, including electrical double layer capacitors, pseudocapacitors and hybrid supercapacitors, were summarized in term of the charge storage mechanism. Second, new-concept supercapacitors with multiple functionalities of high-voltage, fiber-shape, microscale and shape-diversity in order to fulfill the requirements of future electronics are reviewed. Accordingly, special emphasis is given to the structure-dependent-performance effects of pores, hybridization, dimensionalities of graphene-based materials on performance of supercapacitors, and tremendous potential of graphene-based planar micro-supercapacitors for the direct seamlessly integration with versatile micro-electronics. Finally, perspectives and challenges of graphene-based supercapacitors are briefly discussed. | Xiaoyu Shi Shuanghao Zheng Zhong-Shuai Wu Xinhe Bao | 2018 | Journal of Energy Chemistry2018，27，1： | 7 |
| 2 | Scalable fabrication of printed Zn//MnO2 planar micro-batteries with high volumetric energy density and exceptional safety显示文摘The rapid development of printed and microscale electronics imminently requires compatible micro-batteries(MBs)with high performance,applicable scalability,and exceptional safety,but faces great challenges from the ever-reported stacked geometry.Herein the first printed planar prototype of aqueous-based,high-safety Zn//MnO2 MBs,with outstanding performance,aesthetic diversity,flexibility and modularization,is demonstrated,based on interdigital patterns of Zn ink as anode and MnO2 ink as cathode,with high-conducting graphene ink as a metal-free current collector,fabricated by an industrially scalable screen-printing technique.The planar separator-free Zn//MnO2 MBs,tested in neutral aqueous electrolyte,deliver a high volumetric capacity of 19.3 mAh/cm^3(corresponding to 393 mAh/g)at 7.5 mA/cm^3,and notable volumetric energy density of 17.3 mWh/cm^3,outperforming lithium thin-film batteries(≤10 mWh/cm^3).Furthermore,our Zn//MnO2 MBs present long-term cyclability having a high capacity retention of 83.9%after 1300 cycles at 5 C,which is superior to stacked Zn//MnO2 batteries previously reported.Also,Zn//MnO2 planar MBs exhibit exceptional flexibility without observable capacity decay under serious deformation,and remarkably serial and parallel integration of constructing bipolar cells with high voltage and capacity output.Therefore,low-cost,environmentally benign Zn//MnO2 MBs with in-plane geometry possess huge potential as high-energy,safe,scalable and flexible microscale power sources for direction integration with printed electronics. | Xiao Wang Shuanghao Zheng Feng Zhou Jieqiong Qin Xiaoyu Shi Sen Wang Chenglin Sun Xinhe Bao Zhong-Shuai Wu | 2020 | National Science Review2020，7，1： | 5 |
| 3 | Catalysis under shell: Improved CO oxidation reaction confined in Pt@h-BN core-shell nanoreactors显示文摘Core-shell nanostructures consisting of active metal cores and protective shells often exhibit enhanced catalytic performance, in which reactants can access a small part of the core surfaces through the pores in the shells. In this study, we show that Pt nanoparticles (NPs) can be embedded into few-layer hexagonal boron nitride (h-BN) overlayers, forming Pt@h-BN core-shell nanocatalysts. The h-BN shells not only protect the Pt NPs under harsh conditions but also allow gaseous molecules such as CO and O2 to access a large part of the Pt surfaces through a facile intercalation process. As a result, the Pt@h-BN nanostructures act as nanoreactors, and CO oxidation reactions with improved activity, selectivity, and stability occur at the core-shell interfaces. The confinement effect exerted by the h-BN shells promotes the Pt-catalyzed reactions. Our work suggests that two-dimensional shells can function as robust but flexible covers on nanocatalyst surfaces and tune the surface reactivity. | Mengmeng Sun Qiang Fu Lijun Gao Yanping Zheng Yangyang Li Mingshu Chen Xinhe Bao | 2017 | Nano Research2017，10，4： | 5 |
| 4 | Crystallographic tilt in GaN layers grown by epitaxial lateral overgrowth显示文摘 | Feng Gan Zheng Xinhe Zhu Jianjun Shen Xiaoming Zhang Baoshun Zhao Degang Sun Yuanping Zhang Zehong Wang Yutian Yang Hui Liang Junwu | 2002 | Science in China Series A: Mathematics2002，，11： | 1 |
| 5 | Multifunctional polyethyleneimine for synthesis of core-shell nanostructures and electrochemiluminescent detection of three AMI biomarkers显示文摘Simplicity and stability of an analytical method are the key to practical applications.In order to achieve such a goal,a molecule with multifunction could be one of the strategies.In this work,the multifunctional characteristics of branched polyethylenemine(bPEI)were employed for verification of this hypothesis.Three types of amines in the bPEI can be used to synthesize core-shell nanostructures(bPEI@Au and SiO_(2)@bPEI@Au)in a simple one-pot process within 1 h,and as coreactants with over 500-fold enhancement for electrochemiluminescent(ECL)detection.Based on the remarkable performance of bPEI,a label-free ECL immunosensor and its array with the same assembly strategy were constructed for the simple and rapid determination of three acute myocardial infarction(AMI)biomarkers:cardiac troponin I(cTnI),human-type fatty acid binding protein(hFABP)and copeptin.Both methods exhibited excellent stability and sensitivity with wide linear range and low limits of detection down to fg/mL level by the photomultiplier tube and pg/mL level by the electron-multiplying charge-coupled device. | Xu Liang Lan Mi Zhengyou Yu Minghan Wang Yuecong Hu Xinhe Zheng Yi Shao Zhiwei Zhu Yuanhua Shao | 2021 | Science China Chemistry2021，64，12： | 0 |
| 6 | Simplified fabrication of high areal capacitance all-solid-state micro-supercapacitors based on graphene and MnO_2 nanosheets显示文摘All-solid-state micro-supercapacitors are acknowledged as a very promising class of microscale energy storage devices for directly integrating portable and wearable electronics. However, the improvement of electrochemical performance from materials to devices still remains tremendous challenges. Here, we demonstrate a novel and universal mask-assisted filtration technology for the simplified fabrication of all-solid-state planar micro-supercapacitors(MSCs) based on interdigital patterns of 2D pseudocapacitive MnO_2 nanosheets and electrochemically exfoliated graphene film as both electrode and current collector, and polyvinyl alcohol/Li Cl gel as electrolyte. Remarkably, the resulting MSCs exhibit outstanding areal capacitance of ~355 m F/cm^2, which is among the highest values reported in the state-of-the-art MSCs. Meanwhile, MSCs possess exceptionally mechanical flexibility as high as ~92% of initial capacitance even at a highly bending angle of 180°, excellent cyclability with a capacitance retention of 95% after 3000 cycles, and impressive serial or parallel integration for modulating the voltage or capacitance. Therefore, our proposed strategy of simplified construction of MSCs will pave the ways for utilizing graphene and analogous pseudocapactive nanosheets in high-performance MSCs. | Jieqiong Qin Zhong-Shuai Wu Feng Zhou Yanfeng Dong Han Xiao Shuanghao Zheng Sen Wang Xiaoyu Shi Haibo Huang Chenglin Sun Xinhe Bao | 2018 | Chinese Chemical Letters2018，29，4： | 0 |
| 7 | GaN-based ultraviolet microdisk laser diode grown on Si显示文摘This work reports a demonstration of electrically injected GaN-based near-ultraviolet microdisk laser diodes with a lasing wavelength of 386.3 nm at room temperature. The crack-free laser structure was epitaxially grown on Si substrates using an Al-composed down-graded Al N/AlGaN multilayer buffer to mitigate the mismatches in the lattice constant and coefficient of thermal expansion, and processed into “sandwich-like” microdisk structures with a radius of 12 μm. Air-bridge electrodes were successfully fabricated to enable the device electrical characterization. The electrically pumped lasing of the as-fabricated microdisk laser diodes was evidenced by the rapid narrowing down of electroluminescence spectra and dramatic increase in the light output power, as the current exceeded the threshold of 248 mA. | JIN WANG MEIXIN FENG RUI ZHOU QIAN SUN JIANXUN LIU YINGNAN HUANG YU ZHOU HONGWEI GAO XINHE ZHENG MASAO IKEDA HUI YANG | 2019 | Photonics Research2019，7，6： | 0 |
| 8 | Boron-rich layer removal and surface passivation of boron-doped p–n silicon solar cells显示文摘In boron-doped p+-n crystalline silicon(Si) solar cells, p-type boron doping control and surface passivation play a vital role in the realization of high-efficiency and low cost pursuit. In this study, boron-doped p+-emitters are formed by boron diffusion in an open-tube furnace using borontribromide(BBr3) as precursor. The formed emitters are characterized in detail in terms of shape of the doping profile, surface doping concentration, junction depth, sheet resistance and removal of the boron-rich layer(BRL). In the aspect of BRL removal, three different methods were adopted to investigate their influence on device performance. The results demonstrate that our proposed chemical etch treatment(CET) with the proper etching time could be an effective way to remove the BRL.After removal of the BRL, Al_2 O_3/SiN_x stacks are deposited by atomic layer deposition(ALD) and plasma-enhanced chemical vapor deposition(PECVD) to passivate the cell surface. It was found that a reasonably-high implied Voc of 680 mV has been achieved for the fabricated n-type Si solar cells. | Caixia Hou Rui Jia Ke Tao Shuai Jiang Pengfei Zhang Hengchao Sun Sanjie Liu Mingzeng Peng Xinhe Zheng | 2018 | Journal of Semiconductors2018，39，12： | 0 |
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