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| 1 | Enhancing bifunctionality of CoN nanowires by Mn doping for long-lasting Zn-air batteries显示文摘Tailoring the nanostructure and composition of transition metal nitrides is highly important for their use as potent low-cost electrocatalysts. Cobalt nitride(CoN) exhibits strong catalytic activity for oxygen evolution reaction(OER). However, its poor catalytic efficiency for oxygen reduction reaction(ORR) hinders its application in rechargeable zinc-air batteries(ZABs) as the air cathode. In this work, we deploy the effective strategy of Mn doping to improve both OER and ORR activity of CoN nanowires as the cathode material for ZAB. Theoretical calculation predicts that moderate Mn doping in cobalt nitride results in a downshift of the d-band center and reduces the adsorption energy of reaction intermediates. With ~10 at% Mn dopants, stronger catalysis activities for both OER and ORR are achieved compared to pure CoN nanowires. Subsequently, both aqueous and flexible quasi-solid-state ZABs are constructed using the Mn-doped CoN nanowires array as additive-free air cathode. Both types of devices present large open circuit potential, high power density and long-cycle stability. This work pushes forward the progress in developing cost-effective ZABs. | Yongqi Zhang Bo Ouyang Guankui Long Hua Tan Zhe Wang Zheng Zhang Weibo Gao Rajdeep Singh Rawat Hong Jin Fan | 2020 | Science China Chemistry2020，63，7： | 3 |
| 2 | Solution-processable graphene mesh transparent electrodes for organic solar cells显示文摘有好电导率和透明性的 Graphene 网孔电极(GME ) 被标准工业影印石版术和 O2 血浆蚀刻过程用 graphene 答案制作了。器官光电( OPV )用 GME 的房间作为有poly-( 3-hexylthiophene )的混合的透明电极, /phenyl-C61-butyric 酸甲基酉旨( P3HT/PC61BM )作为活跃的层被制作了并且展出2.04%的力量变换效率( PCE ),为透明基于电极的太阳能电池迄今为止报导了的处理答案的 graphene 的最高的 PCE 。 | Qian Zhang Xiangjian Wan Fei Xing Lu Huang Guankui Long Ningbo Yi Wang Ni Zhibo Liu Jianguo Tian Yongsheng Chen | 2013 | Nano Research2013，6，7： | 3 |
| 3 | Lowing the energy loss of organic solar cells by molecular packing engineering via multiple molecular conjugation extension显示文摘The central unit(benzo[c][1,2,5]thiadiazole) in Y6 series of molecules plays a determining role in their unique intermolecular packing for a three-dimensionally(3D) network, largely endowing their organic solar cells(OSCs) with so far the best power conversion efficiencies(PCEs) and also largely suppressed energy losses(Eloss). Despite its vital role in molecular packing, very few explorations for central unit have been conducted due to possibly the constructing challenge of central heterocyclic units.Herein, a highly efficient acceptor-donor-acceptor(A-D-A) type electron acceptor, CH17, has been designed and constructed,featured with a prominent π extension in both directions of the central and end units with respect to Y6 series. Such a multiple and much enhanced conjugation extension in CH17 enables a much more effective and compact 3D molecular packing compared with that of Y6 supported by X-ray single crystal and other analysis, mainly caused by a newly observed distinctive dual “end unit to central unit” packing mode. This much favorable molecular packing, also kept in its blends with donor materials, leads a larger electron and hole transfer integrals and hence much improved charge transport, and reduced energetic disorders in CH17blends. More importantly, the observed upshifted charge transfer(CT) state of CH17 blends compared with that of Y6, due to its increased molecular conjugation extension in both directions, further enhances the hybridization between its CT and local exciton(LE) states, resulting in higher luminescence efficiency, much suppressed non-radiative recombination loss and smaller Elosswith respect to that of Y6. Consequently, an excellent PCE of 17.84% is achieved with PM6 as the donor in a binary device compared with a PCE of 16.27% for the controlled Y6 device. Furthermore, a further improved PCE of 18.13% is achieved by CH17-based ternary single-junction OSCs along with a markedly reduced Elossof 0.49 e V and larger open-circuit voltage(Voc) of0.89 V, compared with that(16.27% of PCE, 0.85 V of Voc, and 0.53 e V of Eloss) of the control device using Y6. This significantly improved photovoltaic performance caused by molecular multiple conjugation extension, especially through the largely unexplored central unit, indicates that there is still much room to further enhance OSC performance by addressing the most important issue for OSC, i.e, the smaller Voccaused by larger Eloss, through engineering molecular packing by designing/tuning molecule more dedicatedly. | Hongbin Chen Yalu Zou Huazhe Liang Tengfei He Xiaoyun Xu Yunxin Zhang Zaifei Ma Jing Wang Mingtao Zhang Quanwen Li Chenxi Li Guankui Long Xiangjian Wan Zhaoyang Yao Yongsheng Chen | 2022 | Science China Chemistry2022，65，7： | 1 |
| 4 | What are the practical limits for the specific surface area and capacitance of bulk sp^2 carbon materials?显示文摘The possible practical limits for the specific surface area and capacitance performance of bulk sp^2 carbon materials were investigated experimentally and theoretically using a variety of carbon materials. We find the limit for the specific surface area to be 3500–3700 m^2 g^(-1), and based on this, the corresponding best capacitance was predicted for various electrolyte systems. A model using an effective ionic diameter for the electrolyte ions was proposed and used to calculate the theoretical capacitance. A linear dependence of experimental capacitance versus effective specific surface area of various sp^2 carbon materials was obtained for all studied ionic liquid, organic and aqueous electrolyte systems. Furthermore, excellent agreement between the theoretical and experimental capacitance was observed for all the tested sp^2 carbon materials in these electrolyte systems, indicating that this model can be applied widely in the evaluation of various carbon materials for supercapacitors. | Yanhong Lu Guankui Long Long Zhang Tengfei Zhang Mingtao Zhang Fan Zhang Yang Yang Yanfeng Ma Yongsheng Chen | 2016 | Science China Chemistry2016，59，2： | 1 |
| 5 | Bromination of Isothianaphthene Derivatives towards the Application in Organic Electronics显示文摘brominate dialkyl isothianaphthene-5,6-dicarboxylate 的不同途径被试试,目标分子和方面产品的单个晶体被获得。有 trans-ethene 的平面共聚物被准备了,它在电影与边在普通器官的溶剂和宽广吸收显示出好溶解度到 967 nm。 | Guankui Long Xiangjian Wan Peng Yun Jiaoyan Zhou Yongsheng Liu Miaomiao Li Mingtao Zhang Yongsheng Chen | 2013 | Chinese Journal of Chemistry2013，31，11： | 1 |
| 6 | A universal hydrochloric acid-assistant powder-to-powder strategy for quick and mass preparation of lead-free perovskite microcrystals显示文摘Lead-free halide perovskite materials possess low toxicity,broadband luminescence and robust stability compared with conventional lead-based perovskites,thus holding great promise for eyes-friendly white light LEDs.However,the traditionally used preparation methods with a long period and limited product yield have curtailed the commercialization of these materials.Here we introduce a universal hydrochloric acid-assistant powder-to-powder strategy which can accomplish the goals of thermal-,pressure-free,eco-friendliness,short time,low cost and high product yield,simultaneously.The obtained Cs_(2)Na_(0.9)Ag_(0.1)In_(0.95)Bi_(0.05)Cl_(6)microcrystals exhibit bright self-trapped excitons emission with quantum yield of(98.3±3.8)%,which could retain(90.5±1.3)%and(96.8±0.8)%after continuous heating or ultraviolet-irradiation for 1000 h,respectively.The phosphor converted-LED exhibited near-unity conversion efficiency from ultraviolet chip to self-trapped excitons emission at~200 mA.Various ions doping(such as Cs_(2)Na_(0.9)Ag_(0.1)InCl_(6):Ln^(3+))and other derived lead-free perovskite materials(such as Cs_(2)ZrCl_(6)and Cs_(4)MnBi_(2)Cl_(12))with high luminous performance are all realized by our proposed strategy,which has shown excellent availability towards commercialization. | Huanxin Yang Xiangxiang Chen Yiyue Chu Changjiu Sun Haolin Lu Mingjian Yuan Yuhai Zhang Guankui Long Libing Zhang Xiyan Li | 2023 | Light(Science & Applications)2023，12，4： | 0 |
| 7 | P-doped all-small-molecule organic solar cells with power conversion efficiency of 17.73%显示文摘All-small organic solar cells(ASM OSCs)inherit the advantages of the distinct merits of small molecules,such as well-defined structures and less batch-to-batch variation.In comparison with the rapid development of polymer-based OSCs,more efforts are needed to devote to improving the performance of ASM OSCs to close the performance gap between ASM and polymer-based OSCs.Herein,a well-known p-dopant named fluoro-7,7,8,8-tetracyano-p-quinodimethane(FTCNQ)was introduced to a highefficiency system of HD-1:BTP-e C9,and a high power conversion efficiency(PCE)of 17.15%was achieved due to the improved electrical properties as well as better morphology of the active layer,supported by the observed higher fill factor(FF)of 79.45%and suppressed non-radiative recombination loss.Furthermore,combining with the further morphology optimization from solvent additive of 1-iodonaphthalene(IN)in the blend film,the HD-1:BTP-e C9-based device with the synergistic effects of both FTCNQ and IN demonstrates a remarkable PCE of 17.73%(certified as 17.49%),representing the best result of binary ASM OSCs to date. | Wanying Feng Kangqiao Ma Guangkun Song Tianyin Shao Huazhe Liang Shudi Lu Yu Chen Guankui Long Chenxi Li Xiangjian Wan Zhaoyang Yao Bin Kan Yongsheng Chen | 2023 | Science China Chemistry2023，66，8： | 0 |
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