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| 1 | 超级电容器能量密度的提升策略显示文摘超级电容器具有优良的脉冲充放电性能和快速充放电性能,同时循环寿命长、工作温度范围宽、安全无污染,但能量密度较低.本文对超级电容器的工作原理、发展状况、缺陷所在和改进方法进行了简要介绍,以作者课题组在高比能超级电容器方面的研究工作为主线,结合近几年的文献报道,重点阐述了超级电容器能量密度的提升策略.主要围绕以下3个方面开展了工作:1)通过将电极材料尺寸纳米化来提高传统电极材料的比容量或开发其他高比容量的电极材料;2)发展具有高电压窗口的离子液体电解液,或利用不同材料在不同电位区间的电容特性构筑不对称电容器,从而提高超级电容器的电压窗口;3)将超级电容器和锂离子电池进行'内部交叉'构筑兼具高能量密度和高功率密度的锂离子混合电容器.最后,对超级电容器的发展进行了展望. | 郎俊伟 张旭 王儒涛 阎兴斌 | 2017 | 电化学2017，23，5： | 12 |
| 2 | Application of ionic liquids as a catalyst in the synthesis of polyvinyl butyral(PVB) polymer显示文摘Polyvinyl butyral(PVB) polymer was successfully synthesized using ionic liquid(IL) catalyst. The synthesis of PVB was achieved by acetalization of polyvinyl alcohol(PVA) and butyraldehyde(BA) in the presence of [HMIM]^+HSO_4^-IL catalyst. The FT-IR,~1H NMR, DSC, GPC and SEM characterizations were used to analyze the structure and properties of PVB. The effects of the concentration of PVA in water and the number of reuse cycles on the acetalization degree were investigated. The results indicated that the maximum acetalization degree of PVB obtained using [HMIM]^+HSO_4^-IL catalyst was up to 72%. The comparison of the commercial PVB and the PVB obtained using [HMIM]^+HSO_4^-IL catalyst showed that the self-made PVB has a larger molecular weight, higher viscosity, and higher acetalization degree than the commercial PVB. | Xi-Xi Qin Zhi-Lin Cheng | 2016 | Chinese Chemical Letters2016，27，1： | 4 |
| 3 | All-solid-state flexible microsupercapacitor based on two-dimensional titanium carbide显示文摘MXenes,serving as a novel family of two-dimensional(2D) metal carbides,have attracted great research interest as one of the promising electrode materials due to the unique properties.However,to our best knowledge,the 2D titanium carbide(one kind of MXene) used in constructing microsupercapacitors(MSCs) has not yet been reported to date.To this end,we firstly produce the MXene films on various kinds of substrates including polyethylene terephthalate(PET),silicon oxide film and titanium plate through vacuum-filtrating and subsequent controlled transferring.On this basis,flexible all-solid-state symmetric MSCs on PET substrate based on MXene films are fabricated by micro-fabrication process using polyvinyl alcohol(PVA)/H_2SO_4 as gel electrolyte.The results show that the as-made MSC has an ultrahigh rate performance with the scan rate of up to 1000Vs^(-1) as well as an ultrafast frequency response(τ_0 = 0.5 ms).In addition,the MSC delivers a large volumetric capacitance of 1.44 F cm^(-3),a high volumetric energy density(0.2 mWh cm^(-3) at the current density of 0.288 A cm^(-3) and a good cycling stability.Our research results presented here may pave the way for a new potential application of MXene in micro-power suppliers and micro-energy storage devices. | Bao-Shou Shen Hao Wang Li-Jun Wu Rui-Sheng Guo Qing Huang Xing-Bin Yan | 2016 | Chinese Chemical Letters2016，27，10： | 2 |
| 4 | Synthesis of Co-Ni oxide microflowers as a superior anode for hybrid supercapacitors with ultralong cycle life显示文摘Li-ion hybrid capacitors(LIHCs),composing of a lithium-ion battery(LIB) type anode and a supercapacitor(SC) type cathode,gained worldwide popularity due to harmonious integrating the virtues of high energy density of LIBs with high power density of SCs.Herein,nanoflakes composed microflower-like Co-Ni oxide(CoNiO) was successfully synthesized by a simple co-precipitation method.The atomic ratio of as-synthesized CoNiO is determined to be 1:3 through XRD and XPS analytical method.As a typical battery-type material,CoNiO and capacitor-type activated polyanilinederived carbon(APDC) were used to assemble LIHCs as the anode and cathode materials,respectively.As a result,when an optimized mass ratio of CoNiO and APDC was 1:2,CoNiO//APDC LIHC could deliver a maximum energy density of 143 Wh kg^1 at a working voltage of 1-4 V.It is worth mentioning that the LIHC also exhibits excellent cycle stability with the capacitance retention of ~78.2%after 15,000 cycles at a current density of 0.5 A g^1. | Ling-Yang Liu Xu Zhang Hong-Xia Li Bao Liu Jun-Wei Lang Ling-Bin Kong Xing-Bin Yan | 2017 | Chinese Chemical Letters2017，28，2： | 1 |
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