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Biowaste derived porous carbon sponge for high performance supercapacitors

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Journal of Materials Science & Technology 2021年第36期95卷 105-113页

作者： Wenbin Zhang Bei Liu Mei Yang yijiang Liu Huaming Li Pingle Liu College of chemistry Xiangtan UniversityXiangtan 411105China Postdoctoral Station of chemical Engineering and Technology Xiangtan UniversityXiangtan 411105China Key Laboratory of Polymeric Materials&Application Technology of Hunan Province Key Laboratory of Advanced Functional Polymeric Materials of College of Hunan Provinceand Key Lab of Environment-Friendly Chemistry and Application in Ministry of EducationXiangtan UniversityXiangtan 411105China College of chemical Engineering Xiangtan UniversityXiangtan 411105China

Here,an agricultural waste(the stem pith of helianthus annuus,SPHA)is firstly used as the precursor for preparing three-dimensional(3D)porous carbon sponge(PCS).The as-prepared 3D PCS(SPHA-700)possesses unique sponge-like structure,large specific surface area(SSA)and high nitrogen doping level(4.52 at.%),which benefit the enhancement of conductivity(5.8 S cm;)and *** a binder-free electrode for solid-state symmetric supercapacitor,SPHA-700 delivers a relatively high specific capacitance of137.1 F g^(-1)at 0.5 Ag^(-1).Moreover,activated SPHA-700(SPHA-ac-700–2)displays an even higher specific capacitance(403.6 F g^(-1)at 0.5 Ag^(-1))in 6.0 M KOH *** SPHA-ac-700–2-based symmetrical supercapacitor can offer high specific capacitance(271 F g^(-1)at 1 Ag^(-1))and good rate capability(82.1%of capacitance retention at 1–80 Ag^(-1))in 6.0 M KOH electrolyte,together with high energy density(23.3 Wh kg^(-1)at 450 W kg^(-1))in 1.0 M na_(2)SO_(4)*** excellent performance of SPHA-ac-700–2 is believed to have originated from the crushed sponge-like structure,O/n-co-doping(10.6 at.%O and3.3 at.%n),high SSA,large total pore volume,and hierarchical pore structure.

关键词： Agricultural waste Carbon sponge Three-dimension Supercapacitors

Thermoelectric Properties of n-type Poly(nickel 1,1,2,2-ethenetetrathiolate)Prepared by a new One-step Solvothermal Method

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Journal of Wuhan University of Technology(Materials Science) 2022年第4期37卷 760-764页

作者： WAnG yijiang YAO Qin QU Sanyin ch.n Lidong State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of ScienceShanghai 200050China University of ch.nese Academy of Sciences Bejing 100049China CAS Key Laboratory of Materials for Energy Conversion Shanghai Institute of CeramicsChinese Academy of ScienceShanghai 200050China School of Physical Science and Technology Shanghai Tech UniversityShanghai 201210China

Poly(nickel 1,1,2,2-ethenetetrathiolate)(poly[na_(x)(ni-ett)])is one of the most promising n-type organic thermoelectric materials which can be used in wearable ***,the conventional solution method is time-consuming and the prepared poly[na_(x)(ni-ett)]usually has poor crystallinity,which does not benefit for achieving high thermoelectric ***,a new one-step solvothermal method under the high reaction temperature and high vapor pressure was developed to prepare poly[na_(x)(ni-ett)]with a quite short *** experimental results show crystallinity and electrical conductivity are greatly enhanced as compared with those prepared by conventional solution *** a result,a maximum ZT value of 0.04 was achieved at 440 K,which is about four times of the polymer prepared by the conventional solution *** study may provide a new route to enhance the TE properties of n-type organic thermoelectric materials.

关键词： thermoelectric organic materials n-type poly[na_(x)(ni-ett)] solvothermal method

Intervention Effect of Repetitive TMS on Behavioral Adjustment After Error Commission in Long-Term Methamphetamine Addicts： Evidence From a Two-choice Oddball Task

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neuroscience Bulletin 2018年第3期34卷 449-456页

作者： Qiongdan Liang Jia Lin Jiemin Yang Xiang Li yijiang ch.n Xianxin Meng Jiajin Yuan Key Laboratory of Cognition and Personality of the Ministry of Education Faculty of Psychology Southwest UniversityChongqing 400715 China Da Lian Shan Institute of Addiction Rehabilitation NanjingChina nanjing Technical University Nanjing China School of Education Nanyang Normal University NanyangChina

Behavioral adjustment plays an important role in the treatment and relapse of drug addiction. nonetheless,few studies have examined behavioral adjustment and its plasticity following error commission in methamphetamine（METH） dependence, which is detrimental to human health. Thus, we investigated the behavioral adjustment performance following error commission in long-term METH addicts and how it varied with the application of repetitive transcranial magnetic stimulation（r TMS） of the left dorsolateral prefrontal cortex（DLPFC）. Twenty-nine male long-term METH addicts（for [ 3 years） were randomly assigned to high-frequency（10 Hz, n = 15） or sham（n = 14） r TMS of the left DLPFC during a two-choice oddball task. Twenty-six age-matched, healthy male adults participated in the two-choice oddball task pretest to establish normal performance for comparison. The results showed that 10 Hz r TMS over the left DLPFC significantly decreased the post-error slowing effect in response times of METH addicts. In addition, the 10 Hz r TMS intervention remarkably reduced the reaction times during post-error trials but not post-correct trials. While the 10 Hz r TMS group showed a more pronounced post-error slowing effect than the healthy participants during the pretest, the posterror slowing effect in the posttest of this sample was similar to that in the healthy participants. These results suggest that high-frequency r TMS over the left DLPFC is a useful protocol for the improvement of behavioral adjustment after error commission in long-term METH addicts.

关键词： METH addiction Repetitive TMS Two choice oddball task Post-error slowing Behavioral adjustment

In-situ self-templating synthesis of 3D hierarchical porous carbonsfrom oxygen-bridged porous organic polymers for highperformance supercapacitors

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nano Research 2022年第9期15卷 7759-7768页

作者： Qi Xiong Bei Liu yijiang Liu Pu Wang Hua ch.ng Huaming Li Zhouguang Lu Mei Yang College of chemistry Xiangtan UniversityXiangtan 411105China Key Laboratory of Polymeric Materials&Application Technology of Hunan Province Key Laboratory of Advanced Functional Polymeric Materialsof College of Hunan Provinceand Key Lab of Environment-Friendly Chemistry and Application in Ministry of EducationXiangtan UniversityXiangtan 411105China Department of Materials Science&Engineering Shenzhen Key Laboratory of Interfacial Science and Engineering of MaterialsSouthern Universityof Science and TechnologyShenzhen 518055China

It is a big challenge to well control the porous structure of carbon materials for supercapacitor ***,a simple in-situ self-templating strategy is developed to prepare three-dimensional(3D)hierarchical porous carbons with good combination of micro and meso-porous architecture derived from a new oxygen-bridged porous organic polymer(OPOP).The OPOP is produced by the condensation polymerization of cyanuric chloride and hydroquinone in naOH ethanol solution and naCl is in-situ formed as by-product that will serve as template to construct an interconnected 3D hierarchical porous architecture upon *** large interface pore architecture,and rich doping of n and O heteroatoms effectively promote the electrolyte accessibility and electronic conductivity,and provide abundant active sites for energy ***,the supercapacitors based on the optimized OPOP-800 sample display an energy density of 8.44 and 27.28 Wh·kg^(−1)in 6.0 M KOH and 1.0 M na2SO4 electrolytes,*** capacitance retention is more than 94%after 10,000 ***,density functional theory(DFT)calculations have been employed to unveil the charge storage mech.nism in the *** results presented in this job are inspiring in finely tuning the porous structure to optimize the supercapacitive performance of carbon materials.

关键词： in-situ self-templating porous organic polymer three-dimensional(3D)hierarchical porous carbons supercapacitors

Metal-coordinated porous polydopamine nanospheres derived Fe_(3)n-FeCo encapsulated n-doped carbon as a highly efficient electrocatalyst for oxygen reduction reaction

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nano Research Energy 2022年第3期1卷 27-34页

作者： Fanjuan Guo Mingyue Zhang Shich.ng Yi Xuxin Li Rong Xin Mei Yang Bei Liu Hongbiao ch.n Huaming Li yijiang Liu College of chemistry and Key Laboratory of Environmentally Friendly chemistry and Application of Ministry of Education Xiangtan UniversityXiangtan 411105China School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGA 30332USA

The exploration of high-efficiency,long-durability,and cost-effectiveness transition metal doped carbon materials to replace the commercial Pt/C in oxygen reduction reaction(ORR)is greatly desirable for promoting the advancement of sustainable energy ***,the Fe_(3)n and FeCo alloy decorated n-doped carbon hybrid material(denoted Fe_(3)n-FeCo@nC)is prepared and applied as the ORR catalyst,which is derived from the two-step pyrolysis of an intriguing complex consisted of metal-coordinated porous polydopamine(PDA)nanospheres(i.e.,Fe-PDA@Co)and *** resulting Fe_(3)n-FeCo@nC delivers outstanding ORR activity with an onset potential(E_(on))of 1.05 V,a half-wave potential(E_(1/2))of 0.89 V,as well as excellent long-term stability and methanol resistance over Pt/***,the home-made Zn-air battery with Fe_(3)n-FeCo@nC as the air-cathode demonstrates much higher open-circuit voltage(1.50 vs.1.48 V),power density(141 vs.113 mW·cm^(−2))and specific capacity(806.6 vs.660.6 mAh·g^(−1)_(Zn))than those of Pt/C *** a remarkable ORR activity of Fe_(3)n-FeCo@nC may stem from the synergistic effect of Fe_(3)n and FeCo active species,the large surface area,the hierarchical porous structure and the exceptional sphere/sheet hybridized architecture.

关键词： porous polydopamine nanospheres melamine in-situ synthesis Fe_(3)n-FeCo nanoparticles oxygen reduction reaction(ORR)electrocatalyst

基于Remez迭代算法求解差分系数的双相介质自适应有限差分正演模拟

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地球物理学报 2020年第6期63卷 2400-2414页

作者：王文化文晓涛张波张懿疆王威成都理工大学油气藏地质及开发工程国家重点实验室成都610059 成都理工大学地球物理学院成都610059 美国阿拉巴马大学地质科学系塔斯卡卢萨354014 中国石油化工股份有限公司勘探分公司成都610041

利用传统有限差分方法对基于Biot理论的双相介质波动方程进行数值求解时,由于慢纵波的存在,数值频散效应较为明显,影响模拟精度.相对于声学近似方程及普通弹性波方程,Biot双相介质波动方程在同等数值求解算法和精度要求条件下,其地震波... 详细信息

利用传统有限差分方法对基于Biot理论的双相介质波动方程进行数值求解时,由于慢纵波的存在,数值频散效应较为明显,影响模拟精度.相对于声学近似方程及普通弹性波方程,Biot双相介质波动方程在同等数值求解算法和精度要求条件下,其地震波场正演模拟需要更多的计算时间.本文针对Biot一阶速度-应力方程组发展了一种变阶数优化有限差分数值模拟方法,旨在同时提高其正演模拟的精度和效率.首先结合交错网格差分格式推导Biot方程的数值频散关系式.然后基于Remez迭代算法求取一阶空间偏导数的优化差分系数,并用于Biot方程的交错网格有限差分数值模拟.在此基础上把三类波的平均频散误差参数限制在给定的频散误差阈值和频率范围内,此时优化有限差分算子的长度就能自适应非均匀双相介质模型中的不同速度区间.数值频散曲线分析表明:基于Remez迭代算法的优化有限差分方法相较传统泰勒级数展开方法在大波数范围对频散误差的压制效果更明显;可变阶数的优化有限差分方法能取得与固定阶数优化有限差分方法相近的模拟精度.在均匀介质和河道模型的数值模拟实验中将本文变阶数优化有限差分算法与传统泰勒展开算法、最小二乘优化算法进行比较,进一步证明其在复杂地下介质中的有效性和适用性.

关键词：正演模拟 Remez迭代算法最小二乘双相介质自适应有限差分

CL20／DnB共晶的热感度分子动力学研究

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化学学报 2016年第7期74卷 612-619页

作者：杨镇薛一江何远航北京理工大学爆炸与科学国家重点实验室北京100081

共晶技术大幅提高了六硝基六氮杂异伍兹烷(CL20)的热稳定性而且保留了CL20高爆速、高爆压等特性.为了研究CL20/1,3-硝基甲苯(DnB)共晶的热感度降低的原因,采用Reax FF/lg反应力场模拟CL20/DnB共晶、CL20/TnT共晶、CL20单晶以及DnB单晶... 详细信息

共晶技术大幅提高了六硝基六氮杂异伍兹烷(CL20)的热稳定性而且保留了CL20高爆速、高爆压等特性.为了研究CL20/1,3-硝基甲苯(DnB)共晶的热感度降低的原因,采用Reax FF/lg反应力场模拟CL20/DnB共晶、CL20/TnT共晶、CL20单晶以及DnB单晶系统的热分解过程.研究发现:CL20/DnB共晶的热感度低于CL20/TnT共晶和CL20单晶的热感度,但高于DnB单晶的热感度.通过分析CL20单晶和CL20/DnB共晶的初始反应路径,揭示了共晶有效降低CL20热感度的机理.CL20/DnB共晶和CL20热分解具有相似的主要产物,nO2、nO3、n2、n2O2、HnO、H2O、CO2和HOnO等,通过反应动力学分析得到CL20/DnB共晶和CL20的活化能.

关键词： ReaxFF/lg 分子动力学 CL20/DnB共晶反应机理热感度

阿科蔓人工水草生态处理技术在农村生活污水治理中的应用

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水处理技术 2010年第5期36卷 118-120页

作者：虞益江竺强方琦杭州市农村能源办公室浙江杭州310020

针对杭州农村地区生活污水治理的需要,从工艺特点、设施构造、运行监测和技术经济指标等方面介绍了阿科蔓生态处理技术在农村地区生活污水治理上的应用,该工艺出水COD、nH3-n分别低于60、10 mg.L-1,均能达到国家污水综合排放标准(GB 897... 详细信息

针对杭州农村地区生活污水治理的需要,从工艺特点、设施构造、运行监测和技术经济指标等方面介绍了阿科蔓生态处理技术在农村地区生活污水治理上的应用,该工艺出水COD、nH3-n分别低于60、10 mg.L-1,均能达到国家污水综合排放标准(GB 8978-1996)一级标准,对富营养化水体流域内农村生活污水的处理具有指导意义。

关键词：阿科蔓生态基生态处理生活污水

氨甲环酸减少体外循环心脏手术后失血的作用及与抑肽酶的比较研究

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中华胸心血管外科杂志 2000年第3期16卷 158-160页

作者：陈艰李清泉陈亦红南京医科大学第一附属医院胸心外科 210029

目的　观察氨甲环酸减少体外循环 (CPB)心脏手术后失血的作用 ,探讨其作用机制 ,并与抑肽酶比较。方法　随机选取CPB心脏手术病人 30例 ,分为氨甲环酸用药组 (TA组 ,10例 ) ,抑肽酶用药组 (AP组 ,10例 )和对照组 (C组 ,10例 )。于CPB前... 详细信息

目的　观察氨甲环酸减少体外循环 (CPB)心脏手术后失血的作用 ,探讨其作用机制 ,并与抑肽酶比较。方法　随机选取CPB心脏手术病人 30例 ,分为氨甲环酸用药组 (TA组 ,10例 ) ,抑肽酶用药组 (AP组 ,10例 )和对照组 (C组 ,10例 )。于CPB前、中、后 2h分别测定t -PA和PAI-1活性、TXB2 和6-keto -PGF1α含量、ADP诱导的血小板最大聚集率和血小板超微结构变化 ,记录各组术后纵隔心包引流量。结果　转流中TA组t -PA活性升高和PAI-1活性下降明显小于另 2组 (P 0 0 5)。结论　氨甲环酸明显抑制了CPB引起的t-PA活性增高 ,并可显著减少术后失血 ,与抑肽酶相比 ,作用相似。

关键词：氨甲环酸抑肽酶体外循环心脏外科手术失血