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| 1 | Porous NiCo_2O_4 nanowires supported on carbon cloth for flexible asymmetric supercapacitor with high energy density显示文摘Recently, binary metal oxides have been considerably researched for energy storage since it can provide higher electrical conductivity and electrochemical activity than single components. Besides, rational arrays structure design can effectively enhance the utilization of active material. In this article, we synthesis a porous NiCo_2O_4 nanowires arrays, which were intimate contact with flexible carbon cloth(CC)by a facile hydrothermal reaction and calcination treatment. The rational array structures of NiCo_2O_4 facilitate the diffusion of electrolyte and effectively increase the utilization of active material. The asobtained NiCo_2O_4@CC electrode exhibits a high capacitance of 1183 mF cm^(-2) and an outstanding capacitance retention of 90.4% after 3000 cycles. Furthermore, a flexible asymmetric supercapacitor(ASC)using NiCo_2O_4@CC as positive electrode and activated carbon cloth(ACC) as negative electrode was fabricated, which delivers a large capacitance of 750 mF cm^(-2)(12.5 F cm^(-3)), a high energy density of 0.24 mWh cm^(-2)(3.91 mWh cm^(-3)), as well as excellent cycle stability under different bending states.These remarkable results suggest that as-assembled NiCo_2O_4@CC//ACC ASC is a promising candidate in flexible energy storage applications. | Huifang Zhang Dengji Xiao Qian Li Yuanyuan Ma Shuxia Yuan Lijing Xie Chengmeng Chen Chunxiang Lu | 2018 | Journal of Energy Chemistry2018，27，1： | 6 |
| 2 | Three-dimensional paper-like graphene framework with highly orientated laminar structure as binder-free supercapacitor electrode显示文摘A free-standing paper-like three-dimensional graphene framework(3DGF) with orientated laminar structure and interconnected macropores, was obtained by the hard template-directed ordered assembly. As the sacrificial templates, polystyrene(PS) latex spheres were assembled with graphene oxide(GO) to build up a sandwich type composite film, followed by heat removal of which with a simultaneous reduction of GO. The 3DGF exhibited high specific surface area of 402.5 m2/g, controllable pores and mechanical flexibility, which was employed as the binder-free supercapacitor electrode and shows high specific gravimetric capacitance of 95 F/g at 0.5 A/g, with enhanced rate capability in 3 electrode KOH system. | Yidan Gao Yaoyao Zhang Yong Zhang Lijing Xie Xiaoming Li Fangyuan Su Xianxian Wei Zhiwei Xu Chengmeng Chen Rong Cai | 2016 | Journal of Energy Chemistry2016，25，1： | 5 |
| 3 | Cellulose nanofiber separator for suppressing shuttle effect and Li dendrite formation in lithium-sulfur batteries显示文摘Lithium-sulfur battery(LSB) has high energy density but is limited by the polysulfides shuttle and dendrite growth during cycling. Herein, a free-standing cellulose nanofiber(CNF) separator is designed and fabricated in isopropanol/water suspension through vacuum filtration progress. CNFs with abundant polar oxygen-containing functional groups can chemically immobilize the polysulfides, and suppress the formation of the dendrites by controlling the surface morphology of the SEI on lithium metal in LSB. The isopropanol content in a suspension can fine-tune the pore structure of the membrane to achieve optimal electrochemical performance. The prepared separator displays integrated advantages of an ultrathin thickness(19 μm), lightweight(0.87 mg cm^(-2)), extremely high porosity(98.05%), and decent electrolyte affinity. As a result, the discharge capacity of the LSB with CNF separator at the first and 100 th cycle is 1.4 and 1.3 times that of PP separator, respectively. Our research provides an environmentalfriendly and facile strategy for the preparation of multifunctional separators for LSBs. | Jingxue Li Liqin Dai Zhefan Wang Hao Wang Lijing Xie Jingpeng Chen Chong Yan Hong Yuan Hongliang Wang Chengmeng Chen | 2022 | Journal of Energy Chemistry2022，31，4： | 4 |
| 4 | Architecture of Co-layered double hydroxide nanocages/graphene composite electrode with high electrochemical performance for supercapacitor显示文摘A facile hydrolysis method was applied to fabricate high-performance Co-layered double hydroxide(LDH)nanocages/graphene composites for supercapacitors. The materials exhibit enhanced rate capability than the counterpart electrode free of graphene while maintaining a high specific capacitance. In addition,such Co-LDH nanocages/graphene composites display an excellent cycling stability; the capacitance retention of Co-LDH nanocages/graphene composite electrode remains 90.4% after 10000 cycles at a current density of 2 A g(-1). The integration of high capacity of double hydroxide and outstanding conductivity of graphene makes the delicately-designed composites promising candidates for electrode materials for supercapacitors. | Xianyu Chu Ting Deng Wei Zhang Dong Wang Xiaofei Liu Cai Zhang Tingting Qin Liyun Zhang Bingsen Zhang Chengmeng Chen Weitao Zheng | 2018 | Journal of Energy Chemistry2018，27，2： | 2 |
| 5 | Macroporous'bubble' graphene film via template-directed or- dered-assemblyfor high rate supercapacitors 显示文摘 | Chen Chengmeng Zhang Qiang Huang Chun Hsien | 2012 | Chem Com- mun2012，48，： | 1 |
| 6 | Design of core-shell nickel oxide/silicon carbide whiskers towards excellent microwave absorption property显示文摘Toward the increasingly serious problem of electromagnetic wave pollution,the development of absorbing material with the properties of the light,thin,wide,strong,and multiple applications scenarios is still a huge challenge.Herein,the core-shell nickel oxide/silicon carbide whiskers(NiO/SiCw)with variational NiO morphologies(tulle-,flower,and rod-like)were designed and fabricated via a facile prehydrothermal method and post-annealing process.For the NiO shell morphology,it can effectively be controlled by the proportion of Ni(NO_(3))_(2)·6H_(2)O,NH_(4)Cl,and CO(NH_(2))_(2).The structure of NiO/SiCw samples was investigated by XRD,SEM,XPS,TEM,and N2 absorption-desorption.Compared to other morphologies of NiO,the flower-like NiO/SiCw possess a porous structure and large surface area that can benefit from the multiple reflections and attenuation of the microwave.As an absorber,the composite with the flower-like NiO/SiCw filler loading of 50%manifests a superior microwave attenuation capability due to its special porous structure,good impedance matching,and large dielectric loss induced from heterojunction interfacial polarization.The minimum reflection loss of flower-like NiO/SiCw is up to-56.8 dB with a thickness of 1.9 mm,and the maximum effective absorption bandwidth(EAB)reaches 5.17 GHz.The as-prepared flower-like NiO/SiCw with strong absorption,thin thickness,and width EAB can meet the potential requirements for microwave absorption materials under oxidation environments. | Jingpeng Chen Ge Song Zhuo Liu Lijing Xie Shoushun Zhang Chengmeng Chen | 2021 | Chinese Journal of Chemical Engineering2021，34，9： | 0 |
| 7 | In-situ conversion of Ni2P/rGO from heterogeneous self-assembled NiO/rGO precursor with boosted pseudocapacitive performance显示文摘Two-dimensional(2 D)heterostructural Ni2 P/rGO is successfully fabricated by in-situ phosphating selfassembled NiO/rGO composites and shows the enhanced electrochemical performances.In this design,the rGO sheets effectively reduce the lattice strain created during the phase transformation from NiO to Ni2 P,thereby maintaining ultrathin nanostructures of Ni2 P.The resulting Ni2 P/rGO layered heterostructure gives the composite plenty of pores or channels,good electrical conductivity and well-exposed active sites.Density functional theory(DFT)calculation further demonstrates that the Fermi energy level and electron localize of near Ni atoms in Ni2 P is higher than that of NiO,which endow Ni2 P with faster and more reversible redox reactivity in dynamic.Benefiting from their structural and compositional merits,the as-synthesized Ni2 P/rGO exhibits high specific discharge capacity and excellent rate performance.Furthermore,a hybrid supercapacitor built with Ni2 P/rGO and activated carbon shows a high specific energy of 38.6 Wh/kg at specific power of 375 W/kg. | Ge Song Zonglin Yi Lijing Xie Zhihong Bi Qian Li Jingpeng Chen Qingqiang Kong Chengmeng Chen | 2020 | Chinese Chemical Letters2020，31，6： | 0 |
| 8 | Chemically Derived Graphene: from Scale-up Production to Multifunctional Application显示文摘Chemically derived graphene(CDG),asproduced by exfoliation and reduction of graphite ox-ide with natural graphite as the raw material,is in-trinsically decorated by abundant functionalitiesand lattice defects,which increased the solventcompatibility for macroscopic assembly for versatileapplications.As the amphiphilic soft-matter。 | Chengmeng Chen | 2016 | 功能材料信息2016，13，5： | 0 |
| 9 | Structural evolution of carbon aerogel microspheres by thermal treatment for high–power supercapacitors显示文摘In this work, a series of carbon aerogel microspheres(CAMs) with tailored pore structures were successfully prepared via a sol-gel method and subsequent heat-treatment at various temperatures from 600 to 1600 ℃. The effects of heat-treatment temperature(HTT) on the CAM microstructure were systematically investigated by physical and chemical characterization. The electrical conductivity increased by up to 250 S/cm and mesopores with high electrolyte accessibility developed in the CAM with increasing HTT. However, the specific surface area(SSA) decreased for HTTs from 1000 to 1600 ℃. The results show that these two factors should be finely balanced for further applications in high power supercapacitors.The CAMs carbonized at 1000 ℃ had the highest SSA(1454 m^2/g), large mesoporous content(20%) and favorable conductivity(71 S/cm). They delivered a high energy density of 38.4 Wh/kg at a power density of 0.17 kW/kg. They retained an energy density of 25.5 Wh/kg even at a high power density of 10.2 kW/kg,and a good rate capability of 84% after 10,000 cycles. This performance is superior to, or at least comparable to, those of most reported carbon materials. | Feng Li Lijing Xie Guohua Sun Fangyuan Su Qingqiang Kong Yufang Cao Xiangyun Guo Chengmeng Chen | 2018 | Journal of Energy Chemistry2018，27，2： | 0 |
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