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Lithium ion battery

Yang Liu, Dandan Sun, Jingjing Zhou, Yingping Qin, Deyu Wang, Bingkun Guo
In this work, we propose a novel electrolyte additive, isophorone diisocyanate(IPDI), to construct the surface protective interlayer. This membrane is produced via nucleophilic addition between the IPDI's diisocyanate groups and the freeradical-onium ion oxidative intermediate of propylene carbonate(PC). In the electrolyte with IPDI added between 10 ~ 20 mM, LiNi0.5Co0.2Mn0.3O2 presents the excellent performance, demonstrating the relative wide operational window to form the optimal protective membrane. This protective membrane ameliorates the cyclic stability...
March 16, 2018: ACS Applied Materials & Interfaces
Sen Xu, Xiaofeng Fan, Jialin Liu, David J Singh, Qing Jiang, Weitao Zheng
We report an investigation of the interactions of Li with silicene. We find silicene to be a promising anode material for high energy density lithium-ion batteries. Based on first-principles calculations, we study the interaction between Li and silicene and explore the microscopic mechanism of Li storage on silicene. We find that Li ion is adsorbed on hollow sites at a very low concentration of less than 1.56%. At a high concentration of Li, the Li chains with up-down pairs on top sites become popular. With the formation of the Li chains, the local structure of silicene is modulated...
March 16, 2018: Physical Chemistry Chemical Physics: PCCP
S N Beznosov, M G Pyatibratov, O V Fedorov
At the end of 1980s, regions of the polypeptide chain of bacterial flagella subunits (flagellins) responsible for different properties of these protein polymers were identified by structural studies. It was found that the N- and C-terminal regions are responsible for the polymerization properties of subunits, and the central region is responsible for antigenic properties of the flagellum. Soon after that, it was proposed to use variability of the central flagellin domain for directed modification to impart new properties to the flagellum surface...
January 2018: Biochemistry. Biokhimii︠a︡
Teng-Sing Wei, Bok Yeop Ahn, Julia Grotto, Jennifer A Lewis
The growing demand for rechargeable lithium-ion batteries (LIBs) with higher capacity in customized geometries underscores the need for new battery materials, architectures, and assembly strategies. Here, the design, fabrication, and electrochemical performance of fully 3D printed LIBs composed of thick semisolid electrodes that exhibit high areal capacity are reported. Specifically, semisolid cathode and anode inks, as well as UV curable packaging and separator inks for direct writing of LIBs in arbitrary geometries are created...
March 15, 2018: Advanced Materials
Min Xu, Shulai Lei, Jing Qi, Qingyun Dou, Lingyang Liu, Yulan Lu, Qing Huang, Siqi Shi, Xingbin Yan
Two-dimensional (2D) Ti3C2 MXene has attracted great attention in electrochemical energy storage devices (supercapacitors, lithium-ion and sodium-ion batteries) due to its excellent electrical conductivity as well as high volumetric capacity. Nevertheless, existing study showed that multivalent Mg2+ ions cannot reversibly insert into MXene, resulting in a negligible capacity. Here we demonstrate a simple strategy to achieve high magnesium storage capability for Ti3C2 MXene by pre-intercalating a cationic surfactant cetyltrimethylammonium bromide (CTAB)...
March 15, 2018: ACS Nano
Eunji Kim, Hyeri Kim, Byung-Jun Park, Young-Hee Han, Jong Hyuk Park, Jinhan Cho, Sang-Soo Lee, Jeong Gon Son
From graphene oxide wrapped iron oxide particles with etching/reduction process, high-performance anode and cathode materials of lithium-ion hybrid supercapacitors are obtained in the same process with different etching conditions, which consist of partially etched crumpled graphene (CG) wrapped spiky iron oxide particles (CG@SF) for a battery-type anode, and fully etched CG for a capacitive-type cathode. The CG is formed along the shape of spikily etched particles, resulting in high specific surface area and electrical conductivity, thus the CG-based cathode exhibits remarkable capacitive performance of 210 F g-1 and excellent rate capabilities...
March 15, 2018: Small
Duong Tung Pham, Joseph Paul Baboo, Jinju Song, Sungjin Kim, Jeonggeun Jo, Vinod Mathew, Muhammad Hilmy Alfaruqi, Balaji Sambandam, Jaekook Kim
Pyrite (FeS2 ) is a promising electrode material for lithium ion batteries (LIBs) because of its high natural availability, low toxicity, cost-effectiveness, high theoretical capacity (894 mA h g-1 ) and high theoretical specific energy density (1270 W h kg-1 , 4e- /FeS2 ). Nevertheless, the use of FeS2 in electrochemical capacitors was restricted due to fast capacity fading as a result of polysulfide (S/Sn 2- ) formation during the initial electrochemical cycling. In order to avoid the formation of polysulfides, we employed the strategy of utilizing an ether based electrolyte (1...
March 15, 2018: Nanoscale
Bingwen Zhang, Qinfang Zhang, Yujie Bai
A new monolayer MnC<sub>2</sub> was predicted as a stable 2D material associated with the
 result of phonon and AIMD calculations. The in-plane young's modulus is 73.6 N/m,
 which is about 20% of graphene. The monolayer MnC<sub>2</sub> is antiferromagnetic with a
 Neil temperature around 280K and from the dirac point of the electronic band we got
 the fermi velocity of 5.37×10<sup>5</sup> m/s showing excellent electronic transport property...
March 15, 2018: Journal of Physics. Condensed Matter: An Institute of Physics Journal
Meng-Ting Li, Ning Kong, Ya-Qian Lan, Zhong-Min Su
We utilise the dual synthesis strategy in terms of bimetallic inorganic building blocks and sulfur containing organic ligand. A novel sulfur-containing bimetallic metal organic framework (Fe2 Co-TPDC) with two types of 4-fold meso-helical structures has been successfully synthesized. Benefitting from the uniform distribution of active sulfur sites and the structural stability of the mixed-metallic method, Fe2 Co-TPDC can efficiently prevent a shuttle behavior of sulfur and endow a commendable specific capacity...
March 15, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
Franz Dinkelacker, Philipp Marzak, Jeongsik Yun, Yunchang Liang, Aliaksandr S Bandarenka
So-called solid electrolyte interface (SEI) in a lithium ion battery largely determines the performance of the whole system. However, it is one of the least understood objects in these types of batteries. SEIs are formed during the initial charge discharge cycles, prevent the organic electrolytes from further decomposition and at the same time govern lithium intercalation into the graphite anodes. In this work, we use electrochemical impedance spectroscopy and atomic force microscopy (AFM) to investigate the properties of SEI film and electrified "graphite/SEI/electrolyte interface"...
March 14, 2018: ACS Applied Materials & Interfaces
Zhishun He, Kai Wang, Shasha Zhu, Liang-Ai Huang, Miaomiao Chen, Jianfeng Guo, Shien Pei, Haibo Shao, Jianming Wang
Hierarchically nanostructured binary/multiple transition metal oxides with electrically conductive coatings are very attractive for lithium-ion batteries (LIBs) owing to their excellent electrochemical properties induced by their unique compositions and microstructures. Herein, hierarchical MnO doped Fe3O4@C composite nanospheres are prepared by a simple one-step annealing in Ar atmosphere, using Mn-doped Fe-based metal organic frameworks (Mn-doped MIL-53(Fe)) as precursor. The MnO doped Fe3O4@C composite particles have a uniform nanosphere structure with a diameter of ~100 nm, and each nanosphere is composed of clustered primary nanoparticles with an amorphous carbon shell, forming a unique hierarchical nanoarchitecture...
March 14, 2018: ACS Applied Materials & Interfaces
Qian Zhao, Qizhen Zhu, Jiawei Miao, Zhaoruxin Guan, Huan Liu, Renjie Chen, Yabin An, Feng Wu, Bin Xu
With the high energy density of 2600 Wh kg-1, lithium-sulfur (Li-S) batteries have been considered as one of the most promising energy storage systems. However, the serious capacity fading resulting from shuttle effect hinders its commercial application. Encapsulating small S2-4 molecules into the pores of ultra-microporous carbon (UMC) can eliminate the dissolved polysulfudes, thus completely inhibit the shuttle effect. Nevertheless, the sulfur loading of S2-4/UMC is usually not higher than 1 mg cm-2 due to the limited pore volume of UMC, which is a great challenge for small sulfur cathode...
March 13, 2018: ACS Applied Materials & Interfaces
Yuxuan Zuo, Biao Li, Ning Jiang, Wangsheng Chu, Hao Zhang, Ruqiang Zou, Dingguo Xia
A high capacity cathode is the key to the realization of high-energy-density lithium-ion batteries. The anionic oxygen redox induced by activation of the Li2 MnO3 domain has previously afforded an O3-type layered Li-rich material used as the cathode for lithium-ion batteries with a notably high capacity of 250-300 mAh g-1 . However, its practical application in lithium-ion batteries has been limited due to electrodes made from this material suffering severe voltage fading and capacity decay during cycling. Here, it is shown that an O2-type Li-rich material with a single-layer Li2 MnO3 superstructure can deliver an extraordinary reversible capacity of 400 mAh g-1 (energy density: ≈1360 Wh kg-1 )...
March 13, 2018: Advanced Materials
Steffen Jeschke, Patrik Johansson, Piotr Jankowski, Adam Best
Cyclodextrins (CDs) are pyranoside-based macromolecules with a hydrophobic cavity to encapsulate small molecules. They are used as molecular vehicles, for instance in pharmaceutical drug delivery or as solubility enhancer of monomers for their polymerization in aqueous solution. In this context, it was discovered about 10 years ago that the bis(trifluoromethylsulonyl)imide (TFSI) anion forms host-guest complexes with βCD in aqueous media. The rising interest in using the TFSI anion in lithium-based battery electrolytes open for its encapsulation by βCD as an attractive approach to increase the contribution of the cation to the total ion conductivity...
March 12, 2018: ChemSusChem
Guangmin Zhou, Kai Liu, Yanchen Fan, Mengqi Yuan, Bofei Liu, Wei Liu, Feifei Shi, Yayuan Liu, Wei Chen, Jeffrey Lopez, Denys Zhuo, Jie Zhao, Yuchi Tsao, Xuanyi Huang, Qianfan Zhang, Yi Cui
Lithium-sulfur (Li-S) batteries are regarded as promising next-generation high energy density storage devices for both portable electronics and electric vehicles due to their high energy density, low cost, and environmental friendliness. However, there remain some issues yet to be fully addressed with the main challenges stemming from the ionically insulating nature of sulfur and the dissolution of polysulfides in electrolyte with subsequent parasitic reactions leading to low sulfur utilization and poor cycle life...
February 28, 2018: ACS Central Science
Yinghui Yang, Shuai Liu, Xiu-Fang Bian, Jinkui Feng, Yongling An, Chao Yuan
The lithium-storage performance of silicon (Si) can be enhanced by alloyed with germanium (Ge) because of its good electronic and ionic conductivity. Here we synthesized three-dimensional nanoporous (3D-NP) SiGe alloy as high performance lithium-ion battery (LIB) anode using a dealloying method with ternary AlSiGe ribbon served as precursor. The morphology and porosity of as-synthesized SiGe alloy can be controlled effectively by adjusting the sacrificial Al content of the precursor. With a Al content of 80%, the 3D-NP SiGe presents uniformly coral-like structure with continuous ligaments and hierarchical micropores and mesopores, which leads to a high reversible capacity of 1158 mA h g-1 after 150 cycles at a current density of 1000 mA g-1 with excellent rate capacity...
March 12, 2018: ACS Nano
Fabian Single, Arnulf Latz, Birger Horstmann
Continued growth of the solid electrolyte interphase (SEI) is the major reason for capacity fade in modern lithium-ion batteries. This growth is made possible by a yet unidentified transport mechanism that limits the passivating ability of the SEI towards electrolyte reduction. We, for the first time, differentiate the proposed mechanisms by analyzing their dependence on the electrode potential. Our calculations are compared to recent experimental capacity fade data. We show that the potential dependence of SEI growth facilitated by solvent diffusion, electron conduction, or electron tunneling qualitatively disagrees with the experimental observations...
March 12, 2018: ChemSusChem
Xu-Jia Hong, Xue-Ying Tang, Qin Wei, Chun-Lei Song, Shuang-Yin Wang, Ren-Feng Dong, Yue-Peng Cai, Li-Ping Si
Lithium-sulfur (Li-S) battery is regarded as one of the most promising next-generation efficient energy storage systems because of its ultrahigh theoretical capacity of 1675 mAh/g and energy density of 2600 Wh/kg accompanied by the environmental benignity and abundance from natural sulfur. However, the insulating nature of sulfur and the dissolution of the polysulfides Li2 Sn (4 ≤ n ≤ 8) seriously restrict its practical application. The metastable small sulfur molecules (S2-4 ) stored in microporous carbon (pore size of <0...
March 12, 2018: ACS Applied Materials & Interfaces
Junzhe Li, Shaohua Luo, Xueyong Ding, Qing Wang, Ping He
In the efforts towards the rapidly increasing demands for high-power application, the cathode materials with three-dimensional (3D) architectures have been proposed. Here, we report the construction of the 3D LiAlO2-LiMnPO4/C cathode materials for lithium ion batteries in an innovation way. The as-prepared 3D active materials LiMnPO4/C and the honeycomb-like Li-ion conductor LiAlO2 framework are used as working electrode directly without additional usage of polymeric binder. The electrochemical performance has been improved significantly due to the special designed core-shell architectures of LiMnPO4/C@LiAlO2...
March 12, 2018: ACS Applied Materials & Interfaces
Feng Ma, Jiashun Liang, Tanyuan Wang, Xian Chen, Yining Fan, Benjamin Hultman, Huan Xie, Jiantao Han, Gang Wu, Qing Li
Li-S battery technology, with high theoretical capacity and energy density, has drawn much attention in recent years as a possible replacement for current Li-ion battery technologies. A major drawback of Li-S batteries is a severe capacity fading effect which, to a large extent, stems from the dissolution and diffusion of lithium polysulfides (LiPS) that are formed during both charge and discharge cycles. The self-discharge caused by the LiPS migration during the charge process (the so-called "shuttle effect") often leads to the capacity decay of Li-S batteries...
March 12, 2018: Nanoscale
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