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Constructing globally consecutive 3. conductive network using P-doped biochar cotton fiber for superior performance of silicon-based anodes

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Journal of Materials Science & Technology 2024年第6期173卷 181-191页

作者： Jun Cao Jianhong Gao Kun Wang Zhuoying Wu Xinxin Zhu Han Li Min Ling chengdu Liang Jun Chen Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China institute of Zhejiang University-Quzhou Zheda Road 99Quzhou 324000China

The inferior conductivity and drastic volume expansion of silicon still remain the bottleneck in achieving high energy density Lithium-ion Batteries(LIBs).The design of the three-dimensional structure of electrodes by compositing silicon and carbon materials has been employed to tackle the above challenges,however,the exorbitant costs and the uncertainty of the conductive structure persist,leaving ample room for ***,silicon nanoparticles were innovatively composited with eco-friendly biochar sourced from cotton to fabricate a 3. globally consecutive conductive *** network serves a dual purpose:enhancing overall electrode conductivity and serving as a scaffold to maintain electrode *** conductivity of the network was further augmented by introducing P-doping at the optimum doping temperature of 3.0}℃.Unlike the local conductive sites formed by the mere mixing of silicon and conductive agents,the consecutive network can affirm the improvement of the conductivity at a macro ***,first-principle calculations further validated that the rapid diffusion of Li^(+)is attributed to the tailored electronic microstructure and charge rearrangement of the *** prepared consecutive conductive Si@P-doped carbonized cotton fiber anode outperforms the inconsecutive Si@Graphite anode in both cycling performance(capacity retention of 1777.15.mAh g^(-1) vs.682.5. mAh g^(-1) after 15. cycles at 0.3.C)and rate performance(1244.24 mAh g^(-1) vs.3.0.28 mAh g^(-1) at 2.0 C).The findings of this study may open up new avenues for the development of globally interconnected conductive networks in Si-based anodes,thereby enabling the fabrication of high-performance LIBs.

关键词： 3. conductive network Biochar carbon-silicon anode Heteroatoms doping strategy DFT calculation Lithium-ion battery

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Land Use of the Three Gorges Reservoir Area and the Effect on Its Landscape Pattern in the Recent 5. Years

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Wuhan University Journal of Natural Sciences 2006年第4期11卷 910-914页

作者： HUANG Zhiqin 1,2,3., ZHOU Wancun 1 ,ZHOU Jieming 4 , ZHU Mingcang 3.5.1. institute of Mountain Hazards and Environment, Chinese Academy of Sciences , chengdu 610041, Sichuan,{3. 2. Graduate University of Chinese Academy of Sciences, Beijing 100049,{3. 3. Sichuan institute of Land Resource Management, chengdu 610041, Sichuan ,{3. 4. Department of Resources and Environment Science, Sichuan Normal University , chengdu 610061, Sichuan,{3. 5. College of Information Engineering, chengdu University of Technology, chengdu 61005., Sichuan,{3. institute of Mountain Hazards and Environment Chinese Academy of Sciences Chengdu Sichuan China Graduate University of Chinese Academy of Sciences Beijing China Sichuan institute of Land Resource Management Chengdu Sichuan China Department of Resources and Environment Science Sichuan Normal University Chengdu Sichuan China College of Information Engineering Chengdu University of Technology Chengdu Sichuan China

The paper makes detailed analysis on the changing processes of the main types of land use in Three Gorges Reservoir Area through the techniques of RS （Remote Sense） and GIS （Geography Information System）. Based on the theory of landscape ecology, many types of landscape pattern indexes are calculated and made correlation analysis. The results indicate that： in 1995.the ecological environment of Three Gorges Reservoir Area was the most vulnerable in the recent 5. years, but resumed in 2002; the landscape pattern diversity index, fractal dimension index and fragmentation index has close correlation with the area of land use/cover change （LUCC）. The research also releases that the increase of the cultivated land, grassland and construction land deteriorates the landscape ecological pattern, while the increase of forest land area will help restore the landscape ecological pattern to its original state. The rapid change of grassland is an important index of the change of landscape pattern, because it has the most effect on change of landscape pattern index.

关键词： the Three Gorges Reservoir Area land use/cover change landscape pattern.

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Land cover changes based on plant successions: Deforestation, rehabilitation and degeneration of forest in the upper Dadu River watershed

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Science china Earth Sciences 2005年第12期48卷 2214-2230页

作者： YAN Jianzhong1,2,3. ZHANG Yili1, BAI Wanqi1, LIU Yanhua4, BAO Weikai5. LIU Linshan1, 2 & ZHENG Du1 1. institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, china 2. Graduate School of the Chinese Academy of Sciences, Beijing 10003., china 3. College of Resources and Environment, Southwest Agricultural University, Chongqing 400716, china 4. The Ministry of Science and Technology, P. C. china, Beijing 100862, china 5. chengdu institute of biology, Chinese Academy of Sciences, chengdu 610041, china 1. institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences 100101 Beijing China 2. Graduate School of the Chinese Academy of Sciences 100039 Beijing China 3. College of Resources and Environment Southwest Agricultural University 400716 Chongqing China 4. The Ministry of Science and Technology P. C. China 100862 Beijing China 5. chengdu institute of biology Chinese Academy of Sciences 610041 Chengdu China

To link regional land use/cover changes with environmental effects, land cover changes are required to reflect vegetation successions, whereas the land cover classification systems commonly used nowadays cannot serve this purpose. In this paper, a new land cover classification system is established in which land covers are classified by the vegetation succes-sions, taking Zamtang County, Barkam County and Jinchuan County in the upper Dadu River watershed as a study area. Using multi-temporal remote sensing images, the land cover data of 1967, 1986 and 2000 are obtained by means of integration of unsupervised classification and visual interpretation methods. The database facilitates the study of land use/cover changes, en-vironmental effects and ecological construction. Land cover changes reflect the main ecological processes in the upper Dadu River watershed. The landscape composed mainly of grasslands, wildwoods and alpine scrubs in 1967 was changed to that of grasslands, secondary forests, al-pine scrubs, fragmentary wildwoods, artificial forests, secondary scrubs in 2000, meanwhile, the landscape got more fragmentized. The total area of the forests decreased by 9.43.. Study results have shown the process of restoration of logged areas in forest centers. From 1967 to 2000, only 6.86 percents of logged areas were converted to shrubs, meadows or crop-lands, and the rest were converted into artificial forests or secondary forests. So the ecological shelter functions will be restored, stage by stage. Firewood collection, charcoal production and overgrazing are the three major triggers for the extensive degradation of alpine oak forests, Sa-bina tibetica forests and meadows. The arid valley grasslands expanded too. The degradation of vegetation in the southern slopes impairs ecological shelter functions and affects livelihood of local residents, so it is essential to find effective measures for ecological restoration and recon-struction. Field investigations have found

关键词： land use/cover classification, upper Dadu River watershed, vegetation successions, GIS, RS.

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Evaluation of Sustainable Land Management and Diagnosis of Obstacle at County Scale in Sichuan Basin:Taking Lezhi County as Example

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Wuhan University Journal of Natural Sciences 2006年第4期11卷 1046-1051页

作者： CHEN Guangjian 1, 2, 3., LIU Qing 1 1. chengdu institute of biology, Chinese Academy of Sciences,{3., Sichuan,china 2. Graduate University of Chinese Academy of Sciences, Beijing 100049,{5. 3. Academy of Land Reconnaissance and Layout of Sichuan Province , chengdu 61003., Sichuan,{5. chengdu institute of biology Chinese Academy of Sciences Chengdu Sichuan China Graduate University of Chinese Academy of Sciences Beijing China Academy of Land Reconnaissance and Layout of Sichuan Province Chengdu Sichuan China

This paper established sustainable land resources evaluating indicators fit for hilly area in Sichuan Basin, Southwest of china, and evaluated the case of sustainable land management of Lezhi County from 1990 to 2001. The result showed that the land resource sustainable utilization ability in Lezhi County is belong to Second level （better sustainable）. Secondly, this paper diagnosed some years obstacles of sustainable land management of Lezhi County from base period to goal period and compared the obstacles factors in the indicators system. There were 16 indexes orderly become major affect factor to land sustainable utilization of Lezhi county in indicator system, of which there are 8 obstacles indexes exist both in 1990 and 2001. The value of obstacles degree of five indicators exceeded 5.in 1990, but in 2001, only two indicators＇ values were more than 5.

关键词： land resources sustainable land management assessment indicators diagnosis of obstacle

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A New Cyclic Peptide from Schnabelia tetradonta

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Chinese Chemical Letters 2003年第9期14卷 934-935页

作者： Hui DOU, Yan ZHOU, Shu lin PENG, Li Sheng DING chengdu institute of biology, Chinese Academy of Sciences,{3. chengdu institute of biology Chinese Academy of Sciences Chengdu 610041

A new cyclic octapeptide (schnabepeptide B) was isolated from the aerial part of Schnabelia tetradonta (Sun) C. Y. Wu et C. Chen (Lamiaceae). Its structure was elucidated as cyclo-(NH-Trp-Gly1-Leu1-Gly2-Pro1-Pro2-Leu2... 详细信息

关键词： Schnabelia tetradonta cyclopeptide schnabepeptide B.

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Nitrogen Mineralization of Prunings of Six N_2-Fixing Hedgerow Species in a Dry Valley of the Jinsha River

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Pedosphere 2002年第1期12卷 25-31页

作者： SUN HUI, TANG YA and ZHAO QIGUO institute of Soil Science, the Chinese Academy of Sciences, Nanjing, 210008 (china) chengdu institute of biology, the Chinese Academy of Sciences,{5. (china) institute of Soil Science the Chinese Academy of Sciences Chengdu 610041 Ghengdu institute of biology the Chinese Academy of Sciences Chengdu 610041 institute of Soil Science the Chinese Academy of Sciences Nanjing 210008

A litterbag experiment of 12 weeks was conducted to study nitrogenmineralization process of prunings of six nitrogen-fixing hedgerowspecies in a dry valley of the Jinsha River. Prunigns wereincorporated into soil or used as mulch. The results indicated thatpruning N of the six hedgerow species was mineralized fast in thefirst week and then decreased slowly in the rest of the study *** prunings were incorporated into soil, the amount of nitrogenmineralized by the end of the first week accounted for 69.9/100,5..2/100, 5..5.100, 43.0/100, 29.6/100 and 20.6/100 of the total N inprungins of Desmodium rensonii, Tephrosia candida, Leucaenaleucoephala, Albizia yunnanensis, Acacia dealbata, and Acaciamearnsii, respectively.

关键词： contour hedgerow system mineralization N, prunings

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Technology of comprehensive disposal and utilization of municipal solid waste (MSW)

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Journal of Environmental Sciences 1999年第3期11卷 378-380页

作者： Liu Xiao\|feng, Liao Yin\|zhang, Liu Ke\|xin chengdu institute of biology, Chinese Academy of Sciences, chengdu\ 610041,{5. 中科院成都生物所四川成都 610041 中科院成都生物所四川成都

The project for treating MSW of 200 tons each day was built in Yibin, Sichuan Province of china. The disposal processes are: separation and selection of usable resources; compost and fermentation of “heavy” organic waste (kitchen, garden composting rubbish); incineration of “light” waste (plastic, paper, wood and bamboo etc.) and landfill of inorganic waste. The thermal energy generated in the process can be used as 1/3.of the whole energy for drying fertilizers. In the process, there is no wastewater drainage, and air emissions can be effectively controlled by a series of measures. The sanitary and environmental indicators of disposal site meet the national standards. This project has worked well for two years. It not only disposes of and reduces the MSW, but also retrieves the resource effectively. The organic fertilizer has been applied in the ten thousand acres of fields, with productivity increase by more than 10%.

关键词： municipal solid waste (MSW) comprehensive utilization composted fertilizer.

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Research on the relationship between site function and environment at the site of Zhongba,Chongqing City,china

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Chinese Science Bulletin 2008年第S1期53卷 58-73页

作者： SUN ZhiBin institute of Cultural Relics and Archaeology of Sichuan Province,chengdu 610041,{3. 1. institute of Cultural Relics and Archaeology of Sichuan Province Chengdu 610041 China

The Zhongba site has been demonstrated to be a location of salt production based on multi-disciplinary research including salt archaeology,environmental archaeology,zooarchaeology,paleobotany,and other natural science *** continuity of salt production from the Han Dynasty to the present day as understood primarily from ancient texts can now be traced back to even earlier times. Based on the characteristics of cultural layer deposits,features,and artifacts,Zhongba can be clearly distinguished from known settlements,and from bronze,iron,pottery and porcelain *** to various natural science examinations,the major impurities in local salt brine are also found in floor features,brine troughs,and rounded bottom pots at the site even though NaCl itself was not *** traces were left over from the salt production process rather than being naturally *** and its constituent features and artifacts share many common characters with other salt production sites around the ***,the Zhongba site can be confidently identified as a salt production site where activity continued for several thousand *** formation of the site cannot be separated from salt production,and it is also highly related to its natural environment.

关键词： Zhongba site function salt production environmental relationships

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THE ACTION OF THE LINEAR CHARACTERGROUP ON THE SET OF NON-LINEARIRREDUCIBLE CHARACTERSTHE ACTION OF THE LINEAR CHARACTERGROUP ON THE SET OF NON-LINEARIRREDUCIBLE CHARACTERS

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Chinese Annals of Mathematics,Series B 2000年第4期21卷 511-524页

作者： RENYONGCAI LIXIANGYANG DepartmentofMathematics SichuanUniversityChengdu610064China. DepartmentofBasicSciences ChengduInstituteofMeteorologyChengdu610041China.

Let G be a nonabelian finite group. Then Irr(G/G’) is an abelian group under the multiplication of characters and acts on the set of non-linear irreducible characters of G via the multiplication of characters. The purpose of this paper is to establish some facts about the action of linear character group on non-linear irreducible characters and determine the structures of groups G for which either all the orbit kernels are trivial or the number of orbits is at most two. Using the established results on this action, it is very easy to classify groups G having at most three non-linear irreducible characters.

关键词： Finite group Character Action Orbit

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Synthesis,crystal structure and thermal behavior of Rb(NTO)·H_2O

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Chinese Science Bulletin 2001年第1期46卷 45-49页

作者： HU Mancheng, GAO Shiyang, LIU Zhihong, SONG Jirong, XIA Shuping & YU Kaibei1. institute of Applied Chemistry, Shaanxi Normal University, Xi’an 710062, china 2. Department of Chemical Engineering, Northwest University, Xi’an 710069, china 3. {3. Branch of Chinese Academy of Sciences, chengdu 610041, china institute of Applied Chemistry Shaanxi Normal University Xi’an China Department of Chemical Engineering Northwest University Xi’an China chengdu Branch of Chinese Academy of Sciences Chengdu China

The Rb(NTO) .H2O crystal has been synthesized by reaction of 3.nitro-l,2,4-triazole-5.one (NTO) with Rb2CO3.in aqueous solution. Its crystal structure has been determined. The crystal belongs to monoclinic system. Crystal structure data: space group P21/ n; a = 0.63. 0(1), b = 0.824 1(2), c =1.296 4(3. nm; β = 97.90(1)°; V = 0.669 9 (2) nm3. Z = 4, Dc= 2.3.6 g/cm3.μ = 7.3.5.nm-1, F(000) = 448. An eight coordinated compound is formed between Rb+ with oxygen atoms and nitrogen atoms. A layer structure is formed by coordination bonds and hydrogen bonds. The thermal decomposition mechanism of this coordination compound is discussed.

关键词： Rb-NTO coordination compound crystal structrue thermal decomposition.

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