期刊文献+
共找到4篇文章
< 1 >
每页显示 20 50 100
原位相分离合成V2O5/Fe2V4O13纳米复合材料及其储钠性能 被引量:4
1
作者 周鹏 盛进之 +3 位作者 高崇伟 董君 安琴友 麦立强 《物理化学学报》 SCIE CAS CSCD 北大核心 2020年第5期134-140,共7页
钠具有资源丰富、成本低廉等优势,因此钠离子电池被认为是未来替代锂离子电池的最佳候选者之一。然而,寻找合适的电极材料是当前制备高性能钠离子电池面临的难题之一。在众多候选材料中,钒酸盐材料通过引入阳离子增加钒的配位数,使得材... 钠具有资源丰富、成本低廉等优势,因此钠离子电池被认为是未来替代锂离子电池的最佳候选者之一。然而,寻找合适的电极材料是当前制备高性能钠离子电池面临的难题之一。在众多候选材料中,钒酸盐材料通过引入阳离子增加钒的配位数,使得材料结构的稳定性得到提高,从而改善了钠离子电池的电化学性能。本文研究了一种原位相分离法合成V2O5/Fe2V4O13纳米复合材料。通过扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射(XRD)、傅里叶变换红外光谱(FTIR)等对电极材料形貌、组成和结构进行了表征。实验结果显示,V2O5/Fe2V4O13纳米复合材料相对于V2O5纳米线材料,结构更加稳定,在0.1 A·g^−1电流密度下,初始放电容量由295.4 mAh·g^−1提升到342 mAh·g^−1,循环100圈容量保持率由26.6%提高到65.8%,获得了更加优异的倍率性能(在1.0 A·g^−1电流密度下,容量由44 mAh·g^−1提高到160 mAh·g^−1)。因此,V2O5/Fe2V4O13纳米复合材料的研究为开拓新型高性能钠离子电池负极材料拓宽了思路。 展开更多
关键词 钠离子电池 负极材料 V2O5/Fe2V4O13 电化学
下载PDF
从比较成本看香菇工厂化生产难行 被引量:12
2
作者 盛进之 《食药用菌》 2016年第1期7-11,共5页
简介我国香菇工厂化生产探索的背景和实践,结合菇类工厂化生产的内涵和特点,比较分析我国现有金针菇、蟹味菇等菇类的工厂化生产与香菇工厂化生产的成本差异和市场价格情况,得出当前香菇工厂化生产在我国还不具备可行性的结论。
关键词 香菇工厂化生产 比较成本 可行性 市场价格
下载PDF
Self-extinguishing Janus separator with high safety for flexible lithium-sulfur batteries 被引量:3
3
作者 Chongbo Sun Jinzhi Sheng +6 位作者 Qi Zhang Runhua Gao Zhiyuan Han Chuang Li Xiao Xiao Ling Qiu Guangmin Zhou 《Science China Materials》 SCIE EI CAS CSCD 2022年第8期2169-2178,共10页
Flexible lithium-sulfur(Li-S)batteries are considered one of the most promising candidates for highenergy-density storage devices in wearable electronics.However,the safety problem severely restricts the practical app... Flexible lithium-sulfur(Li-S)batteries are considered one of the most promising candidates for highenergy-density storage devices in wearable electronics.However,the safety problem severely restricts the practical application of Li-S batteries because of the possible occurrence of thermal runaway caused by battery short circuits and combustible components,particularly under bending conditions.The development of advanced separators that can suppress lithium dendrite growth and are incombustible is the key to improving the safety of flexible Li-S batteries.In this work,a nonflammable multifunctional Janus separator with self-extinguishing capability,high thermal stability,high thermal conductivity,good electrolyte infiltration,uniform lithium deposition,and efficient polysulfide shuttling inhibition,is proposed.The separator is composed of polyacrylonitrile(PAN)fiber and decabromodiphenyl ethane(DBDPE)membrane as well as functional layers of boron nitride(BN)for suppressing lithium dendrite growth and reduced graphene oxide(rGO)for accelerating the sulfur convention kinetics.As a result,the Li-S battery with a sulfur mass loading of2.7 mg cm^(-2) delivers a specific capacity of 916.8 mA h g^(-1) after100 cycles at 0.1 C and maintains a stable performance during intermittent thermal shock.Moreover,the Li-S pouch cell with a sulfur mass loading of 8 mg exhibits a high capacity of6.3 mA h under bending conditions. 展开更多
关键词 Li-S battery Janus separator battery safety FLEXIBILITY thermostability
原文传递
Novel layered K0.7Mn0.7Ni0.3O2 cathode material with enlarged diffusion channels for high energy density sodium-ion batteries 被引量:1
4
作者 Jinghui Chen Zhitong Xiao +5 位作者 Jiashen Meng Jinzhi Sheng Yanan Xu Junjun Wang Chunhua Han Liqiang Mai 《Science China Materials》 SCIE EI CSCD 2020年第7期1163-1170,共8页
As promising,low-cost alternatives of lithiumion batteries for large-scale electric energy storage,sodiumion batteries(SIBs)have been studied by many researchers.However,the relatively large size of Na+leads to sluggi... As promising,low-cost alternatives of lithiumion batteries for large-scale electric energy storage,sodiumion batteries(SIBs)have been studied by many researchers.However,the relatively large size of Na+leads to sluggish diffusion kinetics and poor cycling stability in most cathode materials,restricting their further applications.In this work,we demonstrated a novel K+-intercalated Mn/Ni-based layered oxide material(K0.7Mn0.7Ni0.3O2,denoted as KMNO)with stabilized and enlarged diffusion channels for high energy density SIBs.A spontaneous ion exchange behavior in forming K0.1Na0.7Mn0.7Ni0.3O2between the KMNO electrode and the sodium ion electrolyte was clearly revealed by in situ X-ray diffraction and ex situ inductively coupled plasma analysis.The interlayer space varied from 6.90 to 5.76?,larger than that of Na0.7Mn0.7Ni0.3O2(5.63?).The enlarged ionic diffusion channels can effectively increase the ionic diffusion coefficient and simultaneously provide more K+storage sites in the product framework.As a proof-of-concept application,the SIBs with the as-prepared KMNO as a cathode display a high reversible discharge capacity(161.8 mA h g-1at0.1 A g-1),high energy density(459 W h kg-1)and superior rate capability of 71.1 mA h g-1at 5 A g-1.Our work demonstrates that the K+pre-intercalation strategy endows the layered metal oxides with excellent sodium storage performance,which provides new directions for the design of cathode materials for various batteries. 展开更多
关键词 K0.7Mn0.7Ni0.3O2 K^+pre-intercalation enlarged layered structure high energy density sodium-ion batteries
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部