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Covalency competition induced selective bond breakage and surface reconstruction in manganese cobaltite towards enhanced electrochemical charge storage

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Green Energy & Environment 2024年第5期9卷 909-918页

作者： Peng Gao pei tang Ying Mo peitao Xiao Wang Zhou Shi Chen Hongliang Dong Ziwei Li Chaohe Xu Jilei Liu College of Materials Science and Engineering Hunan Joint International Laboratory of Advanced Materials and Technology for Clean EnergyHunan Province Key Laboratory for Advanced Carbon Materials and Applied TechnologyHunan UniversityChangshaHunan410082China Department of Materials Science and Engineering National University of Defense TechnologyChangshaHunan410073China Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials EngineeringUniversity of MacaoAvenida da UniversidadeTaipaMacao999078China Center for High Pressure Science and Technology Advanced Research PudongShanghai201203China College of Aerospace Engineering Chongqing UniversityChongqing400044China

Manganese cobaltite(MnCo_(2)_(4))is a promising electrode material because of its attractive redox chemistry and excellent charge storage capability.Our previous work demonstrated that the octahedrally-coordinated Mn are prone to react with the hydroxyl ions in alkaline electrolyte upon electrochemical cycling and separates on the surface of spinel to reconstruct into d-MnO_(2) nanosheets irreversibly,thus results in a change of the reaction mechanism with Kþion intercalation.However,the low capacity has greatly limited its practical application.Herein,we found that the tetrahedrally-coordinated Co_(2) þions were leached when MnCo_(2)_(4) was equilibrated in 1 mol L^(-1) HCl solution,leading to the formation of layered CoOOH on MnCo_(2)_(4) surface which is originated from the covalency competition induced selective breakage of the CoT–O bond in CoT–O–CoO and subsequent rearrangement of free Co_(6) octahedra.The as-formed CoOOH is stable upon cycling in alkaline electrolyte,exhibits conversion reaction mechanism with facile proton diffusion and is free of massive structural evolution,thus enables utilization of the bulk electrode material and realizes enhanced speciﬁc capacity as well as facilitated charge transfer and ion diffusion.In general,our work not only offers a feasible approach to deliberate modiﬁcation of MnCo_(2)_(4)'s surface structure,but also provides an in-depth understanding of its charge storage mechanism,which enables rational design of the spinel oxides with promising charge storage properties.

关键词： Manganese cobaltite Tetrahedrally-coordinated Co^(2+)leaching Selective bond breakage Surface reconstruction Charge storage mechanisms

Flexible planar micro supercapacitor diode

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Journal of Energy Chemistry 2024年第6期93卷 429-435,I0011页

作者： Yihui Ma pei tang Zhenyuan Miao Wuyang Tan Qijun Wang Yuecong Chen Guosheng Li Qingyun Dou Xingbin Yan Lingling Shui Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of Matter Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and DevicesSchool of Information and Optoelectronic Science and Engineering&South China Academy of Advanced OptoelectronicsGuangzhou 510006GuangdongChina Department of Materials Science and Engineering Sun Yat-Sen UniversityGuangzhou 510275GuangdongChina College of Materials Science and Engineering Guilin University of TechnologyGuilin 541004GuangxiChina

Supercapacitor diode is a novel ion device that performs both supercapacitor energy storage and ion diode rectification functions.However,previously reported devices are limited by their large size and complex processes.In this work,we demonstrate a screen-printed micro supercapacitor diode(MCAPode)that based on the insertion of a finger mode with spinel ZnCo_(2)O_(4) as cathode and activated carbon as anode for the first time,and featuring an excellent area specific capacitance(1.21 mF cm^(-2)at 10 mV s^(-1))and high rectification characteristics(rectification ratioⅠof 11.99 at 40 mV s^(-1)).Taking advantage of the ionic gel electrolyte,which provides excellent stability during repeated flexing and at high temperatures.In addition,MCAPode exhibits excellent electrochemical performance and rectification capability in"AND"and"OR"logic gates.These findings provide practical solutions for future expansion of micro supercapacitor diode applications.

关键词： Micro devices Supercapacitor diodes Screen-printing Rectification Logic gates

Regulating interfacial chemistry and kinetic behaviors of F/Mo co-doping Ni-rich layered oxide cathode for long-cycling lithium-ion batteries over-20°C-60°C

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Journal of Energy Chemistry 2024年第7期94卷 449-457页

作者： Siqi Guan Lin Tao pei tang Ruopian Fang Huize Wu Nan Piao Huicong Yang Guangjian Hu Xin Geng Lixiang Li Baigang An Feng Li Institute of Energy Materials and Electrochemistry Research University of Science and Technology LiaoningAnshan 114051LiaoningChina Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016LiaoningChina School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016LiaoningChina Shenyang King Power Tech.Co. Ltd.Shenyang 110016LiaoningChina School of Chemical Engineering The University of New South WalesSydney 2052NSWAustralia

Ni-rich layered oxide cathodes have shown promise for high-energy lithium-ion batteries(LIBs)but are usually limited to mild environments because of their rapid performance degradation under extreme temperature conditions(below0°C and above 50 °C).Here,we report the design of F/Mo co-doped LiNi_(0.8)Co_(0.1)iMn_(0.1)O_(2)(FMNCM)cathode for high-performance LIBs from-20 to 60°C.F^(-) doping with high electronegativity into the cathode surface is found to enhance the stability of surface lattice structure and protect the interface from side reactions with the electrolyte by generating a LiF-rich surface layer.Concurrently,the Mo^(6+)doping suppresses phase transition,which blocks Li^(+)/Ni^(2+)mixing,and stabilizes lithium-ion diffusion pathway.Remarkably,the FMNCM cathode demonstrates excellent cycling stability at a high cutoff voltage of 4.4 V,even at 60°C,maintaining 90.6%capacity retention at 3 C after 150 cycles.Additionally,at temperatures as low as-20°C,it retains 77.1%of its room temperature capacity,achieving an impressive 97.5%capacity retention after 500 cycles.Such stable operation under wide temperatures has been further validated in practical Ah-level pouch-cells.This study sheds light on both fundamental mechanisms and practical implications for the design of advanced cathode materials for wide-temperature LIBs,presenting a promising path towards high-energy and long-cycling LIBs with temperatureadaptability.

关键词： Anion-cation co-doping Wide temperature operation Ni-richlayered cathode Phase transition Surface/interface

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考虑车辆稳定的避障路径自适应模型预测跟踪

机械设计与制造 2024年第6期400卷 42-47,52页

作者：陈社会汤沛江苏联合职业技术学院无锡汽车工程分院江苏无锡214153 盐城工学院汽车学院江苏盐城224000

为了提高车辆在稳定行驶前提下的避障路径跟踪控制精度,设计了自适应模型预测路径跟踪控制器和稳定控制器。根据车辆运动特性,建立了车辆在横向和横摆向共三个自由度的车辆动力学方程;基于路径跟踪控制需要,建立了预瞄跟踪控制模型。在... 详细信息

为了提高车辆在稳定行驶前提下的避障路径跟踪控制精度,设计了自适应模型预测路径跟踪控制器和稳定控制器。根据车辆运动特性,建立了车辆在横向和横摆向共三个自由度的车辆动力学方程;基于路径跟踪控制需要,建立了预瞄跟踪控制模型。在避障路径跟踪方面,提出了预测时域随车速和路径曲率自适应变化方法;以提高避障路径跟踪精度和控制量增量最小为优化目标,将路径跟踪控制问题转化为二次型问题,实现了自适应优化求解和时域滚动控制。在车辆行驶稳定方面,从车辆状态的稳定性预判、稳定力矩的计算和分配等方面设计了稳定控制器。经仿真验证,这里的方法能够将车辆状态控制在相平面的双线法稳定区域内,实现了车辆行驶的稳定性和安全性;在避障路径跟踪方面,这里的方法的最大跟踪误差和绝对误差均值远小于传统模型预测控制、文献[14]模糊滑模控制,充分证明了这里的方法在避障路径跟踪控制中的高精度和有效性。

关键词：避障路径模型预测控制自适应预测时域稳定控制器相平面

增施菌剂对玉米产量、土壤养分、光合特性及病虫害的影响

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江西农业学报 2024年第4期36卷 72-76,99页

作者：汤培升甘肃省张掖市甘州区农业技术推广中心甘肃张掖734000

选取4块玉米标准样地,设置了不施肥(CK)、常规施肥(Z_(1))、化肥+西多里微生物菌剂(Z_(2))、化肥+聚谷氨酸复合微生物菌剂(Z_(3))等4个处理,分析了不同菌剂对玉米产量、土壤养分、光合特性及病虫害防治的影响。结果表明:在玉米产量方面... 详细信息

选取4块玉米标准样地,设置了不施肥(CK)、常规施肥(Z_(1))、化肥+西多里微生物菌剂(Z_(2))、化肥+聚谷氨酸复合微生物菌剂(Z_(3))等4个处理,分析了不同菌剂对玉米产量、土壤养分、光合特性及病虫害防治的影响。结果表明:在玉米产量方面,增施菌剂处理后的行粒数、千粒重和产量均高于CK,其中以Z_(3)处理最佳;在土壤养分方面,Z_(1)~Z_(3)处理在拔节期、乳熟期、成熟期的有机质含量均高于CK,以Z_(3)处理为最高;增施菌剂处理后的土壤碱解氮含量均显著高于CK,具体表现为Z_(3)>Z_(2)>Z_(1)>CK;Z_(3)、Z_(2)、Z_(1)处理的土壤速效磷含量在拔节期、乳熟期和成熟期分别是CK的1.78、1.42、1.15倍,1.76、1.48、1.19倍和2.46、1.95、1.47倍;Z_(3)处理的土壤速效钾含量在拔节期、乳熟期和成熟期分别是Z_(2)、Z_(1)处理及CK的1.30、1.17、1.07,1.28、1.19、1.07倍和1.39、1.19、1.09倍;净光合速率和蒸腾速率在乳熟期达到峰值,其中Z_(3)处理的净化光合速率显著高于其他处理,其蒸腾速率分别是Z_(2)、Z_(1)处理及CK的1.51、1.34、1.24倍;在病虫害防治方面,Z_(1)~Z_(3)处理的病株率显著低于CK。综上,增施菌剂可提高玉米产量,改善土壤养分,增强光合特性,减少病虫害,其中化肥+聚谷氨酸复合微生物菌剂的优势最为明显,可在玉米种植中推广应用。

关键词：菌剂玉米产量土壤养分光合特性病虫害防治

中国乡村旅游中农民自组织参与集体行动的影响因素

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Journal of Resources and Ecology 2024年第3期15卷 683-697页

作者：罗文斌楚雪莲唐沛高云红苏明明湖南师范大学旅游学院长沙410081 中国人民大学生态环境学院北京100872

农民自组织参与集体行动是优化乡村旅游治理效率、确保乡村旅游取得积极成果的关键。为了识别其潜在机制,本文选择了Institutional Analysis and Development(IAD)智能决策扩展模型。采用混合方法对湖南省长沙市郊区239户家庭进行问卷... 详细信息

农民自组织参与集体行动是优化乡村旅游治理效率、确保乡村旅游取得积极成果的关键。为了识别其潜在机制,本文选择了Institutional Analysis and Development(IAD)智能决策扩展模型。采用混合方法对湖南省长沙市郊区239户家庭进行问卷调查和20次半结构化访谈。研究结果表明:家庭生计资本、户主特征、旅游市场环境、作为旅游发展进入和退出规则的制度规则、认知改革和土地整理水平对乡村旅游农民自组织参与行为集体行动具有显著影响。其中,旅游市场环境变量下的“居住环境”和“旅游资源”的影响力度最大,土地整理变量下的“土地用途”的影响力度最小。基于研究结果,探讨了本研究的理论和实践意义,并提出了未来的研究方向。

关键词：乡村旅游农户自组织集体行动 IAD扩展框架影响因素

Identification and Expression of a b-actin Gene from Liposcelis bostrychophila Badonnel(Psocoptera:Liposcelididae)

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Agricultural Sciences in China 2011年第9期10卷 1391-1401页

作者： JIANG Hong-bo SHEN Guang-mao DOU Wei tang pei-an LIU Yong-hua ZHOU An-wei WANG Jin-jun Key Laboratory of Entomology and Pest Control Engineering College of Plant Protection Southwest University Chongqing 400716 P. R. China College of Food Science and Engineering Nanjing University of Finance and Economics Nanjing 210003 P.R. China

A β-actin gene, Libβ-actinl, from the psocid, Liposcelis bostrychophila, was isolated, sequenced, and expressed in Escherichia coll. The cDNA sequence was 1 281 bp in length and contained an open reading frame of 1 131 bp encoding 376 amino acids with a predicted molecular weight of 41.82 kDa. According to a B lastN search, the coding region shared the highest identity （97%） with Pediculus hurnanus actin 5C, while the deduced amino acid sequence was completely identical to a mutant of Drosophila melanogaster actin 5C. Comparison of the nucleotide and deduced amino acid sequences confirmed the high similarity between Libβ-actinl and homologs in other insect species. The 3＇ untranslated region （3＇ UTR） of the Libβ-actinl mRNA had a high A＋U content （approximately 75%） and contained three repeats of the AUUUUUA and AUUUA motifs, which may play a role in regulating mRNA decay. The expression of Libβ-actinl was further analyzed in insecticide induced and control psocids. The results indicated that there was no significant difference in expression of Libβ-actinl between the induced and control groups, suggesting that Libβ-actinl may be an appropriate internal control for the gene expression profiling in this insect. Furthermore, Libβ-actinl was also heterologously expressed in Escherichia coli, which provided a basis to investigate the physiological functions of actin genes in the psocid.

关键词： actin sequence analysis expression real-time PCR

Transient temperature characteristics of friction clutch disc considering thermal contact conductance under sliding conditions

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摩擦:英文版 2023年第12期11卷 2253-2263页

作者： Yuwei LIU Yuanzhi SUN Ziyin GAO Fuhao YE pei tang School of Mechanical Electronic and Information Engineering China University of Mining and Technology-BeijingBeijing 100083China China North Vehicle Research Institute Beijing 100072China Huawei Machine Co. Ltd.Dongguan 523808China

High temperatures are generated due to the sliding contacts between the rubbing surfaces of the friction clutch system.In this work,by considering the effective thermal contact conductance under sliding conditions,a simulation model of a two-dimensional transient temperature field of the clutch disc was developed.A numerical solution to obtain the surface temperature at different radii was presented based on the finite difference method.Compared with the experimental data,the proposed model for estimating the surface temperature is more accurate than the conventional prediction method.The results showed that the errors of the calculated temperatures at radii of 114 and 106 mm have obviously reduced by 12.98%and 12.60%,respectively.In addition,the influences of pressure and relative speed on the surface temperature were investigated.The temperature increases with the increase of the relative speed and pressure during the sliding period,and there is an interaction effect between pressure and speed on the surface temperature rise.

关键词： friction clutch finite difference analysis surface temperature thermal contact conductance

Bifunctional fluoropyridinium-based cationic electrolyte additive for dendrite-free Li metal anode

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Nano Research 2023年第7期16卷 9530-9537页

作者： Kunyao Peng pei tang Qianqian Yao Qingyun Dou Xingbin Yan Department of Materials Science and Engineering Sun Yat-Sen UniversityGuangzhou 510275China

Although lithium metal has become a promising anode material for high-energy batteries owing to its high specific capacity and the lowest reduction potential,the continuous side reactions with electrolyte as well as the safety problem caused by Li dendrite growth restrict Li anode’s practical application.Herein,we demonstrate that N-fluoropyridinium(ArF^(+))bis(trifluoromethane)sulfonimide(TFSI-)as an electrolyte additive can protect the lithium metal by both solid electrolyte interphase(SEI)protection and electrostatic repulsion mechanisms.The ArF+cations not only participate in forming F,Ncontaining SEI protective layer on Li surface,but also act as a cationic repellent during Li deposition to inhibit Li dendrite growth.As a result,the cycle performance of Li symmetric cells and Li||LiFePO_(4)full cells were significantly improved by using ArFTFSIadded electrolyte.This study provides an electrolyte additive strategy for Li anode realizing SEI protection and electrostatic repulsion simultaneously.

关键词： lithium metal anode electrolyte additive solid electrolyte interphase(SEI) electrostatic repulsion lithium metal battery(LMB)