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lithium carbonate

Vahid Sokhanvaran, Saeid Yeganegi
The quantum mechanics (QM) method and Grand Canonical Monte Carlo (GCMC) simulations were performed to study the effect of lithium cation doping on the adsorption and separation of CO2, CH4 and H2 on 2-fold interwoven metal-organic framework (MOF) Zn2(NDC)2(diPyNI). The second order Moller-Plesset (MP2) calculations on the (Li+-diPyNI) cluster model showed that the energetically most favorable lithium binding site is above the pyridine ring side and at a distance of 1.817 Å from the oxygen atom. The results revealed that the adsorption capacity of Zn2(NDC)2(diPyNI) for carbon dioxide is higher than that of hydrogen and methane at room temperature...
October 19, 2016: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
Geon-Hyoung An, Do-Young Lee, Yu-Jin Lee, Hyo-Jin Ahn
The use of metal oxides as anode materials in Li-ion batteries (LIBs) are of significant interest to many potential technologies, due to their high theoretical capacity, cost-effectiveness, and environmentally friendly features. In spite of these considerable benefits, and ongoing progress in the field, important challenges exist, associated with structural degradation due to volume expansion of electrode materials. This leads to rapid capacity fading, and must be resolved in order to move towards the practical use of high-performance LIBs with ultrafast cycling stability...
October 19, 2016: ACS Applied Materials & Interfaces
Minhua Cao, Jinwen Qin, Bing Liu
Tin anode materials have attracted much attention due to their high theoretical capacity, although a rapid capacity fade is commonly observed mainly due to structural degradation from volume expansion. Here, we report a versatile strategy based on basil seed-inspired design for constructing monodisperse core-shell Sn@C hybrid confined in a carbon matrix (Sn basil seeds). Analogous to the structure of basil seeds soaked in water, Sn basil seeds have been taken to tackle this volume expansion problem in lithium ion batteries (LIBs)...
October 17, 2016: Chemistry, An Asian Journal
Rami Bou Khalil, Lama Souaiby, Roba Ghossan, Sami Richa
No abstract text is available yet for this article.
September 30, 2016: Journal of Clinical Psychopharmacology
Carola Schultz, Sven Vedder, Martin Winter, Sascha Nowak
The development of a novel high performance liquid chromatography (HPLC) method hyphenated to an ion-trap time-of-flight mass spectrometer (IT-TOF-MS) for the separation and identification of constituents from common organic carbonate solvent-based electrolyte systems in lithium ion batteries (LIBs) is presented in this work. The method development was developed for the qualitative structural elucidation of electrolyte main constituents with a special focus on the aging products of these components. The determination of their limits of detection was performed as well...
October 17, 2016: Analytical Chemistry
Assiya Yermukhambetova, Chun Tan, Sohrab R Daemi, Zhumabay Bakenov, Jawwad A Darr, Daniel J L Brett, Paul R Shearing
Lithium sulfur (Li-S) batteries offer higher theoretical specific capacity, lower cost and enhanced safety compared to current Li-ion battery technology. However, the multiple reactions and phase changes in the sulfur conversion cathode result in highly complex phenomena that significantly impact cycling life. For the first time to the authors' knowledge, a multi-scale 3D in-situ tomography approach is used to characterize morphological parameters and track microstructural evolution of the sulfur cathode across multiple charge cycles...
October 17, 2016: Scientific Reports
Junming Li, Yun Fu, Xiaodong Shi, Zhenming Xu, Zhian Zhang
Urchin-like ZnS microspheres decorated with nitrogen-doped carbon (ZnS@NC) are designed by a facile two-step method, in which the unrchin-like ZnS microspheres were coated by polydopamine and then calcined at inert gas ambient. When employed as the anode material for lithium ion batteries (LIBs) and sodium ion batteries (SIBs), the ZnS@NC electrode can exhibit a reversible lithium storage capacity of 690 mAh g-1 after 100 cycles at 100 mA g-1 and a reversible sodium storage capacity of 460 mAh g-1 after 80 cycles at 200 mA g-1...
October 14, 2016: Chemistry: a European Journal
Rocio Nava, Lee Daniel Cremar, Victor Agubra, Jennifer Sanchez, Mataz Alcoutlabi, Karen Lozano
Composites made of silicon nanostructures in carbon matrices are promising materials for anodes in Li ion batteries given the synergistic storage capacity of silicon combined with the chemical stability and electrical conductivity of carbonaceous materials. This work presents the development of Si/C composite fine fiber mats produced by carbonization of Poly (vinyl alcohol) (PVA)/Si composites. PVA has a high carbon content (ca. 54.5%) and being water soluble, it promotes the development of environmentally friendly materials...
October 12, 2016: ACS Applied Materials & Interfaces
Chao-Ying Fan, Si-Yu Liu, Huan-Huan Li, Hai-Feng Wang, Han-Chi Wang, Xing-Long Wu, Hai-Zhu Sun, Jingping Zhang
The synergistic design of cathode region was conducted to minimize the shuttle effect of polysulfides and decrease the loading of inactive components in order to acquire high-energy-density lithium-sulfur (Li-S) batteries. The well-designed cathode region presented two special characteristics: one was the intertwined nanofibers interlayer based on ultrafine TiO2 nanocrystal uniformly embedded within N-doping porous carbon; the other was the light-weight and three-dimensional current collector derived from reduced graphene oxide coated cellulose fiber paper...
October 12, 2016: ACS Applied Materials & Interfaces
Yang Zhao, Ye Zhang, Hao Sun, Xiaoli Dong, Jingyu Cao, Lie Wang, Yifan Xu, Jing Ren, Yunil Hwang, In Hyuk Son, Xianliang Huang, Yonggang Wang, Huisheng Peng
Flexible lithium-ion batteries are critical for the next-generation electronics. However, during the practical application, they may break under deformations such as twisting and cutting, causing their failure to work or even serious safety problems. A new family of all-solid-state and flexible aqueous lithium ion batteries that can self-heal after breaking has been created by designing aligned carbon nanotube sheets loaded with LiMn2 O4 and LiTi2 (PO4 )3 nanoparticles on a self-healing polymer substrate as electrodes, and a new kind of lithium sulfate/sodium carboxymethylcellulose serves as both gel electrolyte and separator...
October 12, 2016: Angewandte Chemie
Xu Zhao, Jiehe Sui, Fei Li, Haitao Fang, Hongen Wang, Jiangyu Li, Wei Cai, Guozhong Cao
A carbon-free nanocomposite consisting of MoO2 nanoparticles embedded between MoSe2 nanosheets, named MoO2@MoSe2, has been synthesized and demonstrated excellent electrochemical properties for lithium ion batteries. In such a composite, MoSe2 nanosheets provide a flexible substrate for MoO2 nanoparticles; while MoO2 nanoparticles act as spacers to retain the desired active surface to electrolyte and also introduce metallic conduction. In addition, the heterojunctions at the interface between MoSe2 and MoO2 introduce a self-built electric field to promote the lithiation/delithiation process...
October 10, 2016: Nanoscale
Lianbo Ma, Renpeng Chen, Yi Hu, Guoyin Zhu, Tao Chen, Hongling Lu, Jia Liang, Zuoxiu Tie, Zhong Jin, Jie Liu
To improve the energy storage performance of carbon-based materials, considerable attention has been paid to the design and fabrication of novel carbon architectures with structural and chemical modifications. Herein, we report that hierarchical porous nitrogen-rich carbon (HPNC) nanospheres originating from acidic etching of metal carbide/carbon hybrid nanoarchitectures can be employed as high-performance anode materials for both lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs). The structural advantages of HPNC nanospheres are that the exceptionally-high content of nitrogen (17...
October 10, 2016: Nanoscale
Changbao Zhu, Peter Kopold, Weihan Li, Peter A van Aken, Joachim Maier, Yan Yu
Transition metal sulfides have a great potential for energy storage due to the pronouncedly higher capacity (owing to conversion to metal or even alloy) than traditional insertion electrode materials. However, the poor cycling stability still limits the development and application in lithium and sodium ion batteries. Here, taking SnS as a model material, a novel general strategy is proposed to fabricate a 3D porous interconnected metal sulfide/carbon nanocomposite by the electrostatic spray deposition technique without adding any expensive carbonaceous materials such as graphene or carbon nanotube...
December 2015: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Keith Share, Adam P Cohn, Rachel Carter, Bridget Rogers, Cary L Pint
Potassium is an earth abundant alternative to lithium for rechargeable batteries, but a critical limitation in potassium ion battery anodes is the low capacity of KC8 graphite intercalation compounds in comparison to conventional LiC6. Here we demonstrate that nitrogen doping of few-layered graphene can increase the storage capacity of potassium from a theoretical maximum of 278 mAh/g in graphite to over 350 mAh/g, competitive with anode capacity in commercial lithium-ion batteries and the highest reported anode capacity so far for potassium ion batteries...
October 9, 2016: ACS Nano
Shiyong Chu, Yijun Zhong, Rui Cai, Zhaobao Zhang, Shenying Wei, Zongping Shao
A simple and green method is developed for the preparation of nanostructured TiO2 supported on nitrogen-doped carbon foams (NCFs) as a free-standing and flexible electrode for lithium-ion batteries (LIBs), in which the TiO2 with 2.5-4 times higher loading than the conventional TiO2 -based flexible electrodes acts as the active material. In addition, the NCFs act as a flexible substrate and efficient conductive networks. The nanocrystalline TiO2 with a uniform size of ≈10 nm form a mesoporous layer covering the wall of the carbon foam...
September 26, 2016: Small
Craig Milroy, Arumugam Manthiram
A conductive, elastic, electroactive binder composed of polypyrrole and polyurethane is adopted for flexible, high-loading lithium-sulfur cathodes. The conductivity of the polypyrrole helps mitigate the negative effects of insulating sulfur, and the elastomeric matrix accommodates sulfur volume expansion. The binder is used with a simple carbon/sulfur composite to produce high-performance, flexible electrodes without excessive carbon, interlayers, or special additives.
September 22, 2016: Advanced Materials
Ali Eftekhari, Zelang Jian, Xiulei Ji
Potassium may exhibit advantages over lithium or sodium as a charge carrier in rechargeable batteries. Analogues of Prussian blue can provide millions of cyclic voltammetric cycles in aqueous electrolyte. Potassium intercalation chemistry has recently been demonstrated compatible with both graphite and non-graphitic carbons. In addition to potassium-ion batteries, potassium-O2 (or -air) and potassium-sulfur batteries are also emerging. Additionally, aqueous potassium-ion batteries also exhibit high reversibility and long cycling life...
October 7, 2016: ACS Applied Materials & Interfaces
Yue Lu, Xiaona Li, Jianwen Liang, Lei Hu, Yongchun Zhu, Yitai Qian
S/NiS2-C composites were fabricated using a sample melting-diffusing-reacting strategy. When the elemental sulfur content in the composite is 54.9 wt%, it shows good cyclic performance and delivers a specific capacity of 730 mA h g(-1) after 200 cycles at 0.5 C and 544 mA h g(-1) after 500 cycles at 2 C. The elemental sulfur content can be adjusted, and when the elemental sulfur content is increased to 64.8 wt% and 76.0 wt%, the cathodes can maintain a stable cyclic capacity of 386 and 312 mA h g(-1) after being discharged/charged at 2 C for 500 cycles respectively...
October 14, 2016: Nanoscale
Juan Xu, Yuanyuan Li, Lei Wang, Qifa Cai, Qingwei Li, Biao Gao, Xuming Zhang, Kaifu Huo, Paul K Chu
A lithium-ion hybrid supercapacitor (Li-HSC) comprising a Li-ion battery type anode and an electrochemical double layer capacitance (EDLC) type cathode has attracted much interest because it accomplishes a large energy density without compromising the power density. In this work, hierarchical carbon coated WO3 (WO3/C) with a unique mesoporous structure and metal-organic framework derived nitrogen-doped carbon hollow polyhedra (MOF-NC) are prepared and adopted as the anode and the cathode for Li-HSCs. The hierarchical mesoporous WO3/C microspheres assembled by radially oriented WO3/C nanorods along the (001) plane enable effective Li(+) insertion, thus exhibit high capacity, excellent rate performance and a long cycling life due to their high Li(+) conductivity, electronic conductivity and structural robustness...
September 22, 2016: Nanoscale
Keith Share, Adam P Cohn, Rachel E Carter, Cary L Pint
Recently emerging potassium ion (K-ion) batteries offer a lower-cost alternative to lithium-ion batteries while enabling comparably high storage capacity. Here, we leverage the strong Raman spectroscopic response of few-layered graphene to provide the first insight into the electrochemical staging sequence for K(+) ions in graphitic carbons. Our analysis reveals the signature of a dilute stage I compound that precedes formation of ordered intercalation compounds transitioning from stage VI (KC72), stage II (KC24), and stage I (KC8) and correlates electrochemical responses to the stage formation...
September 15, 2016: Nanoscale
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