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Lithium ion battery

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https://www.readbyqxmd.com/read/28654232/cellulose-aerogel-membranes-with-a-tunable-nanoporous-network-as-a-matrix-of-gel-polymer-electrolytes-for-safer-lithium-ion-batteries
#1
Jiqiang Wan, JinMing Zhang, Jian Yu, Jun Zhang
Cellulose aerogel membranes (CAMs) are proposed as a matrix for gel polymer electrolyte to fabricate lithium-ion batteries (LIBs) with superior thermal stability. The CAMs are obtained from a cellulose/ionic liquid solution via a dissolution-regeneration-supercritical drying route. The presence of high porosity, the nanoporous network structure and numerous polar hydroxyl groups benefits the quick absorption of liquid electrolytes for gelation of the CAMs and improves the ionic conductivity of the gelled CAMs...
June 27, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28653063/layered-perovskite-lieutio4-as-a-0-8-v-lithium-intercalation-electrode
#2
Jun Huang, Kaihua Yang, Zhengxi Zhang, Li Yang, Shin-Ichi Hirano
∼1 V lithium intercalation materials are promising anodes for lithium-ion batteries, because such materials give consideration to both the tolerance of lithium plating (e.g., graphite with ∼0.1 V versus Li(+)/Li easily results in lithium plating due to a too low potential) and the energy density of the batteries (e.g., Li4Ti5O12 with ∼1.55 V decreases the battery voltage, and thus reduces the energy density). Herein, the layered perovskite compound LiEuTiO4 with a 0.8 V lithium intercalation/deintercalation potential plateau was successfully synthesized by the ion-exchange reaction with NaEuTiO4 prepared via a sol-gel method...
June 27, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28651203/carbon-coated-zno-mat-passivation-by-atomic-layer-deposited-hfo2-as-an-anode-material-for-lithium-ion-batteries
#3
Mi-Hee Jung
ZnO has had little consideration as an anode material in lithium-ion batteries compared with other transition-metal oxides due to its inherent poor electrical conductivity and large volume expansion upon cycling and pulverization of ZnO-based electrodes. A logical design and facile synthesis of ZnO with well-controlled particle sizes and a specific morphology is essential to improving the performance of ZnO in lithium-ion batteries. In this paper, a simple approach is reported that uses a cation surfactant and a chelating agent to synthesize three-dimensional hierarchical nanostructured carbon-coated ZnO mats, in which the ZnO mats are composed of stacked individual ZnO nanowires and form well-defined nanoporous structures with high surface areas...
June 20, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28650527/chemical-structure-of-specific-sodium-ion-battery-components-with-operando-pair-distribution-function-and-x-ray-diffraction-computed-tomography
#4
Jonas Sottmann, Marco Dimichel, Helmer Fjellvåg, Lorenzo Malavasi, Serena Margadonna, Pooniah Vajeeston, Gavin Vaughan, David Stephen Wragg
To improve lithium and sodium ion battery technology we must understand how the properties of the components are controlled by their chemical structures. Operando structural studies give us some of the most useful information on how batteries work, but it remains difficult to separate out the contributions of the various components of a battery stack (e.g. electrodes, current collectors, electrolyte and binders) and examine specific materials. We have used operando X-ray diffraction computed tomography (XRD-CT) to study specific components of an essentially unmodified, working cell and extract detailed, space resolved structural information on both crystalline and amorphous phases present during cycling...
June 26, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28650157/engineering-mesoporous-single-crystals-co-doped-fe2o3-for-high-performance-lithium-ion-batteries
#5
Huabin Kong, Chade Lv, Chunshuang Yan, Gang Chen
To achieve high-efficiency lithium ion batteries (LIBs), an effective active electrode material is vital. For the first time, mesoporous single crystals cobalt-doped Fe2O3 (MSCs Co-Fe2O3) is synthesized using formamide as a pore forming agent, through a solvothermal process followed by calcination. Compared with mesoporous single crystals Fe2O3 (MSCs Fe2O3) and cobalt-doped Fe2O3 (Co-Fe2O3), MSCs Co-Fe2O3 exhibits a significantly improved electrochemical performance with high reversible capacity, excellent rate capability, and cycling life as anode materials for LIBs...
June 26, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28650143/coupled-carbonization-strategy-towards-advanced-hard-carbon-for-high-energy-sodium-ion-battery
#6
Huimin Zhang, Hai Ming, Wenfeng Zhang, Gaoping Cao, Yusheng Yang
Sodium-ion batteries (SIBs) are expected to be a promising commercial alternative to lithium-ion batteries for grid electricity storage due to their potential low cost in the near future. Up to the present, the anode material still remains a great challenge for the application of SIBs, especially at room temperature. The graphite has an obvious limitation to store larger radius sodium ions (Na+) in comparison with lithium ions (Li+), while the hard carbon with large interlayer distance can demonstrate a relatively high storage capability and durable cycle life...
June 26, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28650020/difference-in-chemical-bonding-between-lithium-and-sodium-salts-influence-of-covalency-on-their-solubility
#7
Su Chen, Jun Ishii, Shunsuke Horiuchi, Masahiro Yoshizawa-Fujita, Ekaterina I Izgorodina
Recent thermal runaways in lithium-ion batteries have reinforced the focus on the research of safer electrolytes based on ionic liquids. A simple switch from organic solvents to ionic liquids has been proven difficult due to the decreased efficiency of batteries caused by decreased conductivity and increased viscosity of ionic liquids upon addition of lithium salts. The new trend in replacing lithium salts with a cheaper alternative, sodium salts, has resulted in rather poor solubility of sodium salts in commonly used ionic liquids...
June 26, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28649830/decreasing-li-ni-disorder-and-improving-the-electrochemical-performances-of-ni-rich-lini0-8co0-1mn0-1o2-by-ca-doping
#8
Minmin Chen, Enyue Zhao, Dongfeng Chen, Meimei Wu, Songbai Han, Qingzhen Huang, Limei Yang, Xiaoling Xiao, Zhongbo Hu
Decreasing Li/Ni disorder has been a challenging problem for layered oxide materials, where disorder seriously restricts their electrochemical performances for lithium-ion batteries (LIBs). Element doping is a great strategy that has been widely used to stabilize the structure of the cathode material of an LIB and improve its electrochemical performance. On the basis of the results of previous studies, we hypothesized that the element of Ca, which has a lower valence state and larger radius compared to Ni(2+), would be an ideal doping element to decrease the Li/Ni disorder of LiMO2 materials and enhance their electrochemical performances...
June 26, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28648064/unraveling-the-magnesium-ion-intercalation-mechanism-in-vanadium-pentoxide-in-a-wet-organic-electrolyte-by-structural-determination
#9
Sung-Chul Lim, Jinhee Lee, Hunho H Kwak, Jongwook W Heo, Munseok S Chae, Docheon Ahn, Yun Hee Jang, Hochun Lee, Seung-Tae Hong
Magnesium batteries have received attention as a type of post-lithium-ion battery because of their potential advantages in cost and capacity. Among the host candidates for magnesium batteries, orthorhombic α-V2O5 is one of the most studied materials, and it shows a reversible magnesium intercalation with a high capacity especially in a wet organic electrolyte. Studies by several groups during the last two decades have demonstrated that water plays some important roles in getting higher capacity. Very recently, proton intercalation was evidenced mainly using nuclear resonance spectroscopy...
June 24, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28648059/polyoxometalate-incorporated-metallapillararene-metallacalixarene-metal-organic-frameworks-as-anode-materials-for-lithium-ion-batteries
#10
Xi-Ya Yang, Tao Wei, Ji-Sen Li, Ning Sheng, Pei-Pei Zhu, Jing-Quan Sha, Tong Wang, Ya-Qian Lan
A series of remarkable crystalline compounds containing metallapillararene/metallacalixarene metal-organic frameworks (MOFs), [Ag5(pyttz)3·Cl·(H2O)][H3SiMo12O40]·3H2O (1), [Ag5(trz)6][H5SiMo12O40] (2), [Ag5(trz)6][H5GeMo12O40] (3), and [Ag5(trz)6][H4PW12O40] (4) (pyttz = 3-(pyrid-4-yl)-5-(1H-1,2,4-triazol-3-yl)-1,2,4-triazolyl, trz = 1,2,4-triazole), have been obtained by using a simple one-step hydrothermal reaction of silver nitrate, pyttz for 1 and trz for 2-4, and Keggin type polyoxometalates (POMs)...
June 24, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28643429/advances-and-challenges-in-metal-sulfides-selenides-for-next-generation-rechargeable-sodium-ion-batteries
#11
REVIEW
Zhe Hu, Qiannan Liu, Shu-Lei Chou, Shi-Xue Dou
Rechargeable sodium-ion batteries (SIBs), as the most promising alternative to commercial lithium-ion batteries, have received tremendous attention during the last decade. Among all the anode materials for SIBs, metal sulfides/selenides (MXs) have shown inspiring results because of their versatile material species and high theoretical capacity. They suffer from large volume expansion, however, which leads to bad cycling performance. Thus, methods such as carbon modification, nanosize design, electrolyte optimization, and cut-off voltage control are used to obtain enhanced performance...
June 23, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28640524/carbon-coated-li3-vo4-spheres-as-constituents-of-an-advanced-anode-material-for-high-rate-long-life-lithium-ion-batteries
#12
Laifa Shen, Shuangqiang Chen, Joachim Maier, Yan Yu
Lithium-ion batteries are receiving considerable attention for large-scale energy-storage systems. However, to date the current cathode/anode system cannot satisfy safety, cost, and performance requirements for such applications. Here, a lithium-ion full battery based on the combination of a Li3 VO4 anode with a LiNi0.5 Mn1.5 O4 cathode is reported, which displays a better performance than existing systems. Carbon-coated Li3 VO4 spheres comprising nanoscale carbon-coating primary particles are synthesized by a morphology-inheritance route...
June 22, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28640435/adjusting-the-chemical-bonding-of-sno2-cnt-composite-for-enhanced-conversion-reaction-kinetics
#13
Yayi Cheng, Jianfeng Huang, Hui Qi, Liyun Cao, Jun Yang, Qiao Xi, Xiaomin Luo, Kazumichi Yanagisawa, Jiayin Li
Carbon nanotubes (CNTs) with excellent electron conductivity are widely used to improve the electrochemical performance of the SnO2 anode. However, the chemical bonding between SnO2 and CNTs is not clearly elucidated despite it may affect the lithiation/delithiation behavior greatly. In this work, an SnO2 @CNT composite with SnC and SnOC bonds as a linkage bridge is reported and the influence of the SnC and SnOC bonds on the lithium storage properties is revealed. It is found that the SnC bond can act as an ultrafast electron transfer path, facilitating the reversible conversion reaction between Sn and Li2 O to form SnO2 ...
June 22, 2017: Small
https://www.readbyqxmd.com/read/28639675/trash-to-treasure-converting-plastic-waste-into-a-useful-graphene-foil
#14
Linfan Cui, Xiaopeng Wang, Nan Chen, Bingxue Ji, Liangti Qu
Recycling of plastic waste has commercial value and practical significance for both environmental safety and recovery of resources. To realize trash recycling, a cheap, simple, and safe solid-state chemical vapor deposition method has been developed to convert a series of daily plastic wastes to a high quality graphene foil (GF) at a large scale. The GF possesses a high electrical conductivity of 3824 S·cm(-1), which is much higher than that of the conventional free-standing graphene film treated at an extremely high temperature of 2200-2500 °C...
June 22, 2017: Nanoscale
https://www.readbyqxmd.com/read/28636826/degradation-mechanisms-of-magnesium-metal-anodes-in-electrolytes-based-on-cf3so2-2n-at-high-current-densities
#15
Hyun Deog Yoo, Sang-Don Han, Igor L Bolotin, Gene M Nolis, Ryan D Bayliss, Anthony K Burrell, John T Vaughey, Jordi Cabana
The energy density of rechargeable batteries utilizing metals as anodes surpasses Li-ion batteries, which employ carbon instead. Among possible metals, magnesium represents a potential alternative to the conventional choice, lithium, in terms of storage density, safety, stability, and cost. However, a major obstacle for metal-based batteries is the identification of electrolytes that show reversible deposition/dissolution of the metal anode and support reversible intercalation of ions into a cathode. Traditional Grignard-based Mg electrolytes are excellent toward reversible deposition of Mg, but their limited anodic stability and compatibility with oxide cathodes hinder their applicability in Mg batteries with higher voltage...
June 21, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28636822/electrochemical-properties-and-speciation-in-mg-hmds-2-based-electrolytes-for-magnesium-ion-batteries-as-a-function-of-ethereal-solvent-type-and-temperature
#16
Laura C Merrill, Jennifer L Schaefer
Magnesium batteries are a promising alternative to lithium-ion batteries due to the widespread abundance of magnesium and its high specific volumetric energy capacity. Ethereal solvents such as tetrahydrofuran (THF) are commonly used for magnesium-ion electrolytes due the chemical compatibility with magnesium metal, but the volatile nature of THF is a concern for practical application. Herein, we investigate magnesium bis(hexamethyldisilazide) plus aluminum chloride (Mg(HMDS)2-AlCl3) electrolytes in THF, diglyme, and tetraglyme at varying temperature...
June 21, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28635185/antipulverization-electrode-based-on-low-carbon-triple-shelled-superstructures-for-lithium-ion-batteries
#17
Lianhai Zu, Qingmei Su, Feng Zhu, Bingjie Chen, Huanhuan Lu, Chengxin Peng, Ting He, Gaohui Du, Pengfei He, Kai Chen, Shihe Yang, Jinhu Yang, Huisheng Peng
The realization of antipulverization electrode structures, especially using low-carbon-content anode materials, is crucial for developing high-energy and long-life lithium-ion batteries (LIBs); however, this technology remains challenging. This study shows that SnO2 triple-shelled hollow superstructures (TSHSs) with a low carbon content (4.83%) constructed by layer-by-layer assembly of various nanostructure units can withstand a huge volume expansion of ≈231.8% and deliver a high reversible capacity of 1099 mAh g(-1) even after 1450 cycles...
June 21, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28633526/reduced-graphene-oxide-poly-acrylic-acid-aerogels-as-a-three-dimensional-replacement-for-metal-foil-current-collectors-in-lithium-ion-batteries
#18
Han Xiao, Joshua P Pender, Mackenzie Meece-Rayle, J Pedro de Souza, Kyle C Klavetter, Heonjoo Ha, Jie Lin, Adam Heller, Christopher J Ellison, Charles Buddie Mullins
We report the synthesis and properties of a low-density (~5 mg/cm3) and highly-porous (99.6% void space) three-dimensional reduced graphene oxide (rGO)/poly(acrylic acid) (PAA) nanocomposite aerogel as the scaffold for cathode materials in lithium-ion batteries (LIBs). The rGO-PAA is both simple and starts from readily-available graphite and PAA thereby providing a scalable fabrication procedure. The scaffold can support as much as a 75 mg/cm2 loading of LiFePO4 (LFP) in a ~ 430 µm thick layer, and the porosity of the aerogel is tunable by compression; the flexible aerogel can be compressed 30-fold (i...
June 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28632270/silicon-anodes-protected-by-a-nitrogen-doped-porous-carbon-shell-for-high-performance-lithium-ion-batteries
#19
Jinhui Zhu, Jun Yang, Zhixin Xu, Jiulin Wang, Yanna Nuli, Xiaodong Zhuang, Xinliang Feng
Silicon (Si) anodes, which are among the most promising candidates for high-energy lithium-ion batteries (LIBs), have attracted considerable attention from both academic and industrial communities. However, Si anodes usually suffer from an inherently low conductivity and extremely large volume change during the lithiation and delithiation processes, and consequently exhibit an inferior rate capability and poor cycle life. In this paper, we report new porous polymer-derived carbon coated Si nanoparticles (NPs) as the next generation anodes for LIBs to overcome these serious problems...
June 20, 2017: Nanoscale
https://www.readbyqxmd.com/read/28632167/preparation-of-ce-and-la-doped-li%C3%A2-ti%C3%A2-o12-nanosheets-and-their-electrochemical-performance-in-li-half-cell-and-li%C3%A2-ti%C3%A2-o12-lifepo%C3%A2-full-cell-batteries
#20
Meng Qin, Yueming Li, Xiao-Jun Lv
This work reports on the synthesis of rare earth-doped Li₄Ti₅O12 nanosheets with high electrochemical performance as anode material both in Li half and Li₄Ti₅O12/LiFePO₄ full cell batteries. Through the combination of decreasing the particle size and doping by rare earth atoms (Ce and La), Ce and La doped Li₄Ti₅O12 nanosheets show the excellent electrochemical performance in terms of high specific capacity, good cycling stability and excellent rate performance in half cells. Notably, the Ce-doped Li₄Ti₅O12 shows good electrochemical performance as anode in a full cell which LiFePO₄ was used as cathode...
June 20, 2017: Nanomaterials
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