通讯作者：
Mei Ding<&wdkj&>Xiaobo Zhu<&wdkj&>Chuankun Jia
作者机构：
[Xuechun Lou; Hu Fu; Jian Xu; Yong Long; Su Yan; Haitao Zou; Bo Lu; Murong He; Xiaobo Zhu] College of Materials Science and Engineering, Changsha University of Science & Technology, Changsha 410114, China;National Engineering Laboratory of Highway Maintenance Technology, School of Traffic & Transportation Engineering, Changsha University of Science & Technology, Changsha 410114, China;[Mei Ding; Chuankun Jia] College of Materials Science and Engineering, Changsha University of Science & Technology, Changsha 410114, China<&wdkj&>National Engineering Laboratory of Highway Maintenance Technology, School of Traffic & Transportation Engineering, Changsha University of Science & Technology, Changsha 410114, China
摘要：
Based on inexpensive, safe, and environmentally friendly active redox species, neutral polysulfide-ferrocyanide redox flow batteries (PFRFBs) have attracted much attention for large-scale energy storage. However, the development of PFRFBs is undermined by the expensive commercial membrane materials as well as the sluggish polysulfide redox reactions. This work attempts to solve these critical problems by combining the economical membrane with the highly catalytic electrode. In specific, K+-exchanged sulfonated polyether ether ketone (SPEEK-K) membranes have been investigated in PFRFBs to replace the costly Nafion membrane. SPEEK-K with optimized degree of sulfonation enables the PFRFB high average coulombic efficiency of 99.80% and superior energy efficiency of 90.42% at a current density of 20 mA cm-2. Meanwhile, to overcome the kinetic limitations of polysulfide redox reactions, a CuS-modified carbon felt electrode is demonstrated with excellent catalytic performance, enabling the PFRFB higher and more stable energy efficiency over cycling. The combination of the cost-effective membrane with the catalytic electrode in one cell leads to a capacity retention of 99.54% after 1180 cycles and an outstanding power density (up to 223 mW cm-2). The significant enhancements of electrochemical performance at reduced capital cost will make the PFRFB more promising for large-scale energy storage systems.
作者机构：
[Weng, Zheng; Chen, Gen; Chen, Long; Di, Shenghan; Wu, Gang; Zhang, Ning] Cent South Univ, Sch Mat Sci & Engn, Key Lab Elect Packaging & Adv Funct Mat Hunan Prov, Changsha 410083, Peoples R China.;[Zhang, Ying; Liu, Xiaohe] Zhengzhou Univ, Zhongyuan Crit Met Lab, Henan 450001, Peoples R China.;[Zhang, Ying; Liu, Xiaohe] Zhengzhou Univ, Sch Chem Engn, Henan 450001, Peoples R China.;[Jia, Chuankun] Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410114, Peoples R China.
通讯机构：
[Ying Zhang] Z;[Gen Chen] S;Zhongyuan Critical Metals Laboratory and School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, Henan, P. R. China<&wdkj&>School of Materials Science and Engineering, Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan Province, Central South University, Changsha 410083, China
摘要：
Along with the surging demand for of rechargeable alkali-ion (Li+, Na+, or K+) batteries, the cost and availability of the battery materials become critical. In this paper, we report the use of spent asphalt, which is widely available and even poses environmental risks, to produce a high-performing universal Li/Na/K-ion host material. Taking advantage of a the nano-Fe2O3 template, the spent asphalt is converted into mesoporous carbon with an interconnected three-dimensional porous structure, high surface area, and numerous rich crystal defects. As an anode material for Li-ion batteries, the mesoporous carbon exhibits a reversible capability of 674.2 mA h g(-1) at 0.2 A g(-1) as well as excellent rate and cycling performance (258.7 mA h g(-1) at 1.0 A g(-1) after 1000 cycles) owing to the shortened diffusion path of ion and easier penetration of electrolytes. The carbon anode also delivers superior reversible capacities and cycling stability in Na-ion and K-ion batteries. With the potential to simul-taneously tackle energy and environmental problems, the spent asphalt-derived mesoporous carbon is promising for large-scale applications.
摘要：
采用电镀和水热反应两步法制备了一种高柔性Ni Te/Ni@CC超级电容器正极材料。利用X射线衍射、扫描电镜、能谱仪和电化学工作站对Ni Te/Ni@CC电极进行了表征与分析。结果表明,该电极具有CC-Ni-Ni Te的层次结构;在电流密度为5 m A/cm~2时,电极的面积比电容达到2.85 F/cm~2;由该电极组装的Ni Te/Ni@CC//AC/CC全固态柔性超级电容器在5.57 m W/cm~2的面功率密度下可提供高达0.50 m W·h/cm~2的面能量密度,并且在0～90°的2 000次弯曲循环后,具有77.20%的初始电容保持率。
关键词：
energy harvesting;energy harvesting;interaction;interaction;Internet of Things (IoT);Internet of Things (IoT);P-TENGs;P-TENGs;paper-based sensors;paper-based sensors;self-powered devices;self-powered devices;triboelectric nanogenerator;triboelectric nanogenerator
通讯机构：
[Chuansheng Chen] C;College of Materials Science and Engineering, School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, People’s Republic of China
摘要：
Sn-doping ZnMn2O4 (Sn-ZMO) porous microspheres with shell structure were synthesized by utilizing SnO as Sn source. The effect of Sn content on its structure, morphology, and performance was investigated. Sn doping can increase the crystal plane spacing of ZnMn2O4 (ZMO) microspheres and enhance the electrochemical performance of ZMO materialis. When the Sn-doping content is 0.5%, the specific capacitance of Sn-ZMO microspheres is 18.5% higher than that of pure ZMO microsphere, which reaches 530 F/g under the current density of 1 A/g. Furthermore, the cycle stability has a significant promotion. 77% of the capacity is maintained after 2000 cycles under the scan rate of 20 mV/s. The enhancement in electrochemical performance is attributed to form a spherical shell with a certain thickness after ZMO microsphere were doped by Sn atom, in which the spherical shell can suppresses the volume expansion during the charge-discharge process. (C) 2021 Elsevier B.V. All rights reserved.
摘要：
Currently,Na-ion battery（NIB） has become one of the most potential alternatives for Li-ion batteries due to the safety and low cost.As a promising anode for Na-ion storage,expanded graphite has attracted considerable attention.However,the sodiation-desodiation process is still unclear.In our work,we obtain expanded graphite through slight modified Hummer’s method and subsequent thermal treatment,which exhibits excellent cycling stability.Even at a high current density of 1 A g-1,our expanded graphite still remains a high reversible capacity of 100 mA h g-1 after 2600 cycles.Furthermore,we also investigate the electrochemical mechanism of our expanded graphite for Na-ion storage by operando Raman technique,which illuminate the electrochemical reaction during different sodiation-desodiation processes.
摘要：
Nanostructured iron sulfides are regarded as a potential anode material for sodium-ion batteries in virtue of the rich natural abundance and remarkable theoretical capacity.However,poor rate performance and inferior cycling stability caused by sluggish kinetics and volume swelling represent two main obstacles at present. The previous research mainly focuses on nanostructure design and/or hybridizing with conductive materials.Further boosting the property by adjusting Fe/S atomic ratio in iron sulfides is rarely reported.In this work,Fe7 S8 and FeS2 encapsulated in N-doped hollow carbon fibers（NHCFs/Fe7 S8 and NHCFs/FeS2） are constructed by a combined chemical bath deposition and subsequent sulfidation treatment.The well-designed NHCFs/Fe7 S8 electrode displays a remarkable capacity of 517 mAh g-1 at 2 A g-1after 1000 cycles and a superb rate capability with a capability of 444 mAh g-1 even at 20 A g-1 in etherbased electrolyte.Additionally,the rate capability of NHCFs/Fe7 S8 is superior to that of the contrast NHCFs/FeS2 electrode and also much better than the values of the most previously reported iron sulfide-based anodes.The in-depth mechanism explanation is explained by further experimental analysis and theoretical calculation,revealing Fe7 S8 displays improved intrinsic electronic conductivity and faster Na+ diffusion coefficient as well as higher reaction reversibility.
关键词：
3D Ni3Se2 nano-Architectures;Electrochemical performances;Supercapacitor;Electrochemical activity
摘要：
The multifunctional 3D Ni3Se2 nano-architectures were successfully synthesized by a facile solvothermal route, and their electrochemical performances were systematically investigated. As electrode for supercapacitor, 3D Ni3Se2 nano-architectures exhibited a high specific capacity of 1545.6 mu Ah cm(-2), good rate capability and excellent cycling stability. Besides, as the electrodes for hydrogen evolution and oxygen evolution reactions, 3D Ni3Se2 nano-architectures demonstrated electrochemical activity and stability towards water splitting. Moreover, the electrocatalytic behaviors of the nanostructures were also investigated at various temperatures. Remarkably, as an electrolyzer for overall water splitting, 3D Ni3Se2 nano-architectures showed low cell voltages of 1.61 V for anode and -1.75 V for cathode at 10 mA cm(-2) and stability for 10 h. The work presented here sheds some light on the development of low-cost and high-activity multifunctional electrode materials for electrochemical energy storage and conversion. (C) 2020 Elsevier B.V. All rights reserved.
期刊：
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing,2021年814:141245 ISSN：0921-5093
通讯作者：
Chao Chen<&wdkj&>Xiaochun Liu
作者机构：
[Li, Dan; Huang, Hualong; Chen, Chao; Zhang, Xiaoyong; Zhou, Kechao; Liu, Shichao] Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China.;[Liu, Xiaochun] Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Inst Met, Changsha 410004, Peoples R China.
通讯机构：
[Chao Chen] S;[Xiaochun Liu] I;State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, China<&wdkj&>Institute of Metals, College of Materials Science and Engineering, Changsha University of Science & Technology, Changsha, 410004, China
摘要：
In addition to the great merits of producing three-dimensional complex components from metallic powders in additive manufactured parts, the microstructural features can be tailored by the intrinsic heat treatment (IHT), i. e., cyclic re-heating without any additional post-treatment of the printed samples. Here we report that the microstructural configurations can be widely manipulated in an additive manufactured Ti-5Al-5Mo-5V-1Cr-1Fe (Ti-55511) near ? titanium alloy, with an emphasis on the effect of IHT on the in-situ precipitation of ? phase. The typical as-printed samples consist of prior-? grains, coarse primary ? (?I) colony and nanoscale secondary ? (?II) laths. Based on automatic quantitative image analysis, the increase of substrate temperature has a remarkable impact on accelerating the precipitation of nanoscale ?II laths, while suppressing the precipitation kinetics of the primary ? colony, and the corresponding volume fraction of ?II laths increases from only 2% to more than 40%, resulting in a tensile strength increment from 900 MPa to 1200 MPa. The enhanced strength derives from those extremely fine ?II laths in terms of boundary strengthening. The findings in this work provide a strategy of strengthening additively manufactured components by taking advantage of one step intrinsic heat treatment.
期刊：
Colloids and Surfaces A: Physicochemical and Engineering Aspects,2021年628:127230 ISSN：0927-7757
通讯作者：
Fan, Jincheng(fanjincheng2009@163.com)
作者机构：
[Cui, Kexin; Fan, Jincheng; Li, Songyang; Li, Shidong; Khadidja, Moukaila Fatiya; Wu, Jianghong; Jin, Hong-Guang; Chao, Zisheng] Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410114, Hunan, Peoples R China.;[Wu, Jianghong] Shenzhen Technol Univ, Coll Hlth Sci & Environm Engn, Shenzhen 518118, Guangdong, Peoples R China.;[Zeng, Wengao] Xi An Jiao Tong Univ, Int Res Ctr Renewable Energy, State Key Lab Multiphase Flow Power Engn, Xian 710049, Peoples R China.;[Wei, Huige] Tianjin Univ Sci & Technol, Coll Chem Engn & Mat Sci, Tianjin Key Lab Brine Chem Engn & Resource Ecouti, Tianjin 300457, Peoples R China.;[Naik, Nithesh] Manipal Acad Higher Educ, Manipal Inst Technol, Dept Mech & Mfg Engn, Manipal 576104, Karnataka, India.
通讯机构：
[Jincheng Fan; Zisheng Chao] C;[Huige Wei] T;[Zhanhu Guo] I;Tianjin Key Laboratory of Brine Chemical Engineering and Resource Ecoutilization, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, 300457, China<&wdkj&>Integrated Composites Laboratory (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, TN 37996, USA<&wdkj&>College of Materials Science and Engineering, Changsha University of Science and Technology, Changsha, Hunan 410114, China
