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101.
Batteries: A Flexible 3D Multifunctional MgO‐Decorated Carbon Foam@CNTs Hybrid as Self‐Supported Cathode for High‐Performance Lithium‐Sulfur Batteries (Adv. Funct. Mater. 37/2017) 下载免费PDF全文
102.
Lei Huang Jiaojiao Li Bo Liu Yahao Li Shenghui Shen Shengjue Deng Chengwei Lu Wenkui Zhang Yang Xia Guoxiang Pan Xiuli Wang Qinqin Xiong Xinhui Xia Jiangping Tu 《Advanced functional materials》2020,30(22)
Pursuit of advanced batteries with high‐energy density is one of the eternal goals for electrochemists. Over the past decades, lithium–sulfur batteries (LSBs) have gained world‐wide popularity due to their high theoretical energy density and cost effectiveness. However, their road to the market is still full of thorns. Apart from the poor electronic conductivity of sulfur‐based cathodes, LSBs involve special multielectron reaction mechanisms associated with active soluble lithium polysulfides intermediates. Accordingly, the electrode design and fabrication protocols of LSBs are different from those of traditional lithium ion batteries. This review is aimed at discussing the electrode design/fabrication protocols of LSBs, especially the current problems on various sulfur‐based cathodes (such as S, Li2S, Li2Sx catholyte, organopolysulfides) and corresponding solutions. Different fabrication methods of sulfur‐based cathodes are introduced and their corresponding bullet points to achieve high‐quality cathodes are highlighted. In addition, the challenges and solutions of sulfur‐based cathodes including active material content, mass loading, conductive agent/binder, compaction density, electrolyte/sulfur ratio, and current collector are summarized and rational strategies are refined to address these issues. Finally, the future prospects on sulfur‐based cathodes and LSBs are proposed. 相似文献
103.
104.
3D Carbonaceous Current Collectors: The Origin of Enhanced Cycling Stability for High‐Sulfur‐Loading Lithium–Sulfur Batteries 下载免费PDF全文
Hong‐Jie Peng Wen‐Tao Xu Lin Zhu Dai‐Wei Wang Jia‐Qi Huang Xin‐Bing Cheng Zhe Yuan Fei Wei Qiang Zhang 《Advanced functional materials》2016,26(35):6351-6358
The cycling stability of high‐sulfur‐loading lithium–sulfur (Li–S) batteries remains a great challenge owing to the exaggerated shuttle problem and interface instability. Despite enormous efforts on design of advanced electrodes and electrolytes, the stability issue raised from current collectors has been rarely concerned. This study demonstrates that rationally designing a 3D carbonaceous macroporous current collector is an efficient and effective “two‐in‐one” strategy to improve the cycling stability of high‐sulfur‐loading Li–S batteries, which is highly versatile to enable various composite cathodes with sulfur loading >3.7 mAh cm?2. The best cycling performance can be achieved upon 950 cycles with a very low decay rate of 0.029%. Moreover, the origin of such a huge enhancement in cycling stability is ascribed to (1) the inhibition of electrochemical corrosion, which severely occurs on the typical Al foil and disables its long‐term sustainability for charge transfer, and (2) the passivation of cathode surface. The role of the chemical resistivity against corrosion and favorable macroscopic porous structure is highlighted for exploiting novel current collectors toward exceptional cycling stability of high‐sulfur‐loading Li–S batteries. 相似文献
105.
Gas Pickering Emulsion Templated Hollow Carbon for High Rate Performance Lithium Sulfur Batteries 下载免费PDF全文
Matthew Li Yining Zhang Xiaolei Wang Wook Ahn Gaopeng Jiang Kun Feng Gregory Lui Zhongwei Chen 《Advanced functional materials》2016,26(46):8408-8417
A CO2 in water nanoparticle stabilized Pickering emulsion is used to template micrometer sized hollow porous nitrogen doped carbon particles for high rate performance lithium sulfur battery. For the first time, nanoparticles serve the dual role of an emulsion stabilizer and a pore template for the shell, directly utilizing in situ generated CO2 bubbles as template for the core. The minimalistic nature of this method does not require expensive surfactants or additional core templates. Upon polymerization of melamine formaldehyde onto CO2, a robust polymer/silica composite shell is formed and transformed into a porous shell upon washing. The micrometer‐sized hollow morphology in combination with its nitrogen rich porous shell demonstrates impressive rate capabilities of 670 and 500 mAh g?1 even at a high rate of 7C and 9C, respectively. This material also possesses excellent cycle durability, exhibiting a low capacity decay of 0.088%/cycle over 300 cycles. Measurement of the shuttle current and impedance provides interesting insight into the polysulfide mass transfer mechanism of hollow structured sulfur hosts. 相似文献
106.
Li‐S‐Batteries: Advanced Lithium–Sulfur Batteries Enabled by a Bio‐Inspired Polysulfide Adsorptive Brush (Adv. Funct. Mater. 46/2016) 下载免费PDF全文
107.
108.
介绍了中国石油化工股份有限公司济南分公司加工原油中的硫含量变化情况及其形态分布,分析了原油中硫化物在常减压蒸馏过程中的转化规律,讨论了常减压蒸馏装置中的硫腐蚀机理及腐蚀类型,并通过腐蚀监测和缓蚀剂评价对常减压蒸馏装置中出现的几种主要的硫腐蚀类型提出了防护措施。 相似文献
109.
湖南下寒武统石煤中的镍钼铂族元素的地球化学特征 总被引:8,自引:0,他引:8
从岩石学、矿床学、微量元素地球化学、稳定同位素方面对湖南下寒武统石煤中镍、钼、铂族元素为主的伴生元素的来源和富集成因进行了研究研究认为,含矿岩系中发育的硅岩是一种喷流岩;有海底喷流作用直接堆积的金属硫化物筒状富矿体;矿石中各种胶状结构发育;矿床具两套成矿系统;微量元素Se,As,Ba高地壳丰度数倍至数万倍;矿层中硫同位素值为-1300%~-1761%等证实了湖南下寒武统石煤中以镍、钼、铂族元素为主的伴生元素,其来源和富集并非陆源搬运沉积,而是与海底喷流作用有关 相似文献
110.
介绍了节能环保型照明装置微波硫灯的发光机理,关键技术,性能特点及国内外发展现状,同时指出了该装置具有广阔的推广应用前景。 相似文献