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Enhanced zinc storage performance of mixed valent manganese oxide for flexible coaxial fiber zinc-ion battery by limited reduction control

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Journal of Materials Science & Technology 2021年第15期74卷 52-59页

作者： Xiaobei Zang Li Lingtong jiaxin meng Lijia Liu Yuanyuan Pan Qingguo Shao Ning Cao School of Materials Science and Engineering.China University of Petroleum(East China) Qingdao266580China Department of Chemistry University of Western Ontario1151 Richmond StreetLondonOntarioN6A5B7Canada State Key Laboratory of Heavy Oil Processing Institute of New EnergyCollege of Chemical EngineeringChina University of Petroleum(East China)Qingdao266580China

While manganese-based cathodes have been intensively studied for zinc-ion batteries(ZIBs),the limited rate capability and cycle life have always been a difficult problem to be ***,we report a mixed valent manganese oxide(MnOx)cathode with superior electrochemical performance,which exhibits a high specific capacity of 450 mA h/g at 0.2 C and a satisfactory specific capacity of 158.3 mA h/g at a high rate of 5 *** mixed cathode system reduces the charge transfer resistance,and show good surface stability and adsorption properties,so it is beneficial for the storage of Zn^(2+).Meanwhile,coaxial fiber ZIBs(CFZIBs)with splendid flexibility are assembled utilizing the elaborately prepared cathode *** CFZIBs achieve a reversible capacity of 255.8 m A h/g and the capacity retention rate is as high as 80%after 1000 bending *** study provides new opportunities for designing ZIBs with high performance and high flexibility.

关键词： Mixed valent manganese oxide Limited reduction Storage mechanism Flexible zinc-ion battery Coaxial fiber structure

The Magic of Water Towns: Wuzhen and Xitang

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China Today 2024年第8期73卷 74-79页

作者： meng jiaxin 不详

The appeal of Wuzhen and Xitang continues in the modern era,attracting millions of visitors every year to explore their beauty and cultural *** and Xitang,two old towns in Zhejiang Province in east China,are historically known as places of singular serenity and sublime ***,they are top tourist destinations because of their well-preserved landscapes,gleaming water bodies,and bracing water town air.

关键词： Magic attracting landscape

In vitro Anthocyanin Induction and Metabolite Analysis in Malus spectabilis Leaves Under Low Nitrogen Conditions

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Horticultural Plant Journal 2020年第5期6卷 284-292页

作者： jiaxin meng Yan Gao Meiling Han Pengyuan Liu Chen Yang Ting Shen Houhua Li College of Landscape Architecture and Art Northwest A&F UniversityYanglingShaanxi 712100China

Anthocyanins are the most widely produced secondary metabolites in plants,and they play an important role in plant growth and *** nitrogen source is an important factor affecting anthocyanin production,but the nitrogen concentrations on metabolism and the underlying genetic basis remain *** this study,in vitro anthocyanin induction was conducted on Malus *** leaf explants were cultivated in media containing different nitrogen *** results suggested that when the nitrogen contents decreased in limit,the color of leaf explants turned from green to red,and increased anthocyanin accumulation led to a change in ***,the content of other flavonoids,such as dihydroquercetin,epicatechin,and catechin,increased under low nitrogen *** transcription levels of the general flavonoid pathway genes,from phenylalanine ammonia lyase(PAL)to anthocyanidin synthase(ANS),were associated with the concentration of corresponding flavonoid compounds and phenotype *** particular,the expression level of ANS increased substantially under a low nitrogen treatment,which was significantly and positively correlated with the anthocyanin levels(R2=0.72,P<0.05).The increased expression patterns of anthocyanin pathway genes were similar to that of the transcription factor *** further verified MYB10 played an important role in the anthocyanin pathway in leaves of Malus *** results suggested that we can improve the desirable ornamental plant phenotypes by controlling nitrogen *** process may offer clues to further development of new agricultural practices.

关键词： crabapple pigment flavonoid in vitro low nitrogen stress

Guqin: A Tranquil Sound for A Modern Era

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China Today 2021年第10期70卷 78-80页

作者： meng jiaxin 不详

TWO thousand years ago,there lived a Chinese musician named Yu *** loved creating music but sadly no one could truly appreciate his *** day,a woodcutter named Zhong Ziqi listened to Boya’s music and told Boya how he saw high mountains and flowing water in his *** was ecstatic over finding someone who shared mutual feelings with him,and then took Zhong as his soulmate in *** the day Zhong died,Yu smashed his instrument,as he knew never again would he find someone who could so instinctively understand his music.

关键词： someone mutual mountains

Shapotou:A Desert Oasis along the Yellow River

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China Today 2022年第12期71卷 76-79页

作者： meng jiaxin 不详

Here where the Yellow River runs through the undulating dunes of the desert,the distinct achievements of anti-desertification efforts are the pride of all Chinese people.

关键词： Desert desertification undulating

Fu Qiaomei: Completing the Puzzle of Human Evolution

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China Today 2023年第8期72卷 66-70页

作者： meng jiaxin 不详

Figuring out where we come from is a historical subject that requires committed exploration and research by *** young paleogenetic scientist,Fu Qiaomei,has recently made a breakthrough in ancient DNA research by searc... 详细信息

关键词： let has breakthrough

Education Through Games

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China Today 2024年第10期73卷 72-73页

作者： meng jiaxin 不详

An Olympic scholar is teaching the Olympic culture in schools so that youngsters learn perseverance,resilience and fair play.

关键词： culture teaching schools

Ancient Zhenyuan, Gateway to East Guizhou

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China Today 2024年第12期73卷 76-80页

作者： meng jiaxin 不详

This ancient city has a history going back over 2,000 *** has witnessed the fusion of multiple ethnic cultures including the Miao,Dong,and Han,and hosts a number of cultural heritage *** old town of Zhenyuan is located in Zhenyuan County,Qiandongnan Miao and Dong Autonomous Prefecture in southwest China’s Guizhou *** an area of just around three square kilometers,it sits on the banks of the Wuyang River and is surrounded by moun*** has been a county for more than 2,281 years and was the prefectural capital during the Yuan(1271-1368)and Qing(1644-1911)*** is a multicultural region,with Miao,Dong,and other ethnic minorities making up nearly half of the population.

关键词： Guizhou Gateway southwest

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A Five-Year Journey

China Today 2022年第12期71卷 26-30页

作者： meng jiaxin 不详

While China remains committed to its course of opening up,the CIIE also sees exhibitors committed to being a part of the onward progression.

关键词： committed progression. Five