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https://www.readbyqxmd.com/read/29904996/a-3-d-organically-synthesized-porous-carbon
#1
Ziqiang Zhao, Saikat Das, Guolong Xing, Pierre Fayon, Patrick Heasman, Michael Jay, Steven Bailey, Colin Lambert, Hiroki Yamada, Toru Wakihara, Abbie Trewin, Teng Ben, Shilun Qiu, Valentin Valtchev
We report the first organically synthesized sp-sp3 hybridized porous carbon, OSPC-1. This new carbon shows electron conductivity, high porosity, the highest uptake of lithium ions of any carbon material to-date and the ability to inhibit dangerous lithium dendrite formation. The new carbon exhibits exceptional potential as anode material for lithium-ion batteries (LIBs) with high capacity, excellent rate capability, long cycle life and potential for improved safety performance.
June 14, 2018: Angewandte Chemie
https://www.readbyqxmd.com/read/29904945/flexible-mns-carbon-fiber-hybrids-for-lithium-ion-and-sodium-ion-energy-storage
#2
Shuang Gao, Gang Chen, Yohan Dall'Agnese, Yingjin Wei, Zhongmin Gao, Yu Gao
Nanostructures can improve batteries capacity and cycle life, especially with sulfides electrodes. In this work, a freestanding flexible electrode consisting of MnS nanoparticles embedded onto carbon nanofibers was prepared by electrospinning. The produced hybrid was used as electrode for lithium ion and sodium ion batteries. MnS nanoparticles have a size of about 5 nm and the particles are evenly distributed in the carbon nanofibers. Carbon nanofibers act as electronic conductor and buffer of the volume change while MnS nanoparticles react through rapid electrochemical reaction...
June 14, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29904154/quantification-and-modeling-of-mechanical-degradation-in-lithium-ion-batteries-based-on-nanoscale-imaging
#3
Simon Müller, Patrick Pietsch, Ben-Elias Brandt, Paul Baade, Vincent De Andrade, Francesco De Carlo, Vanessa Wood
Capacity fade in lithium-ion battery electrodes can result from a degradation mechanism in which the carbon black-binder network detaches from the active material. Here we present two approaches to visualize and quantify this detachment and use the experimental results to develop and validate a model that considers how the active particle size, the viscoelastic parameters of the composite electrode, the adhesion between the active particle and the carbon black-binder domain, and the solid electrolyte interphase growth rate impact detachment and capacity fade...
June 14, 2018: Nature Communications
https://www.readbyqxmd.com/read/29901395/internally-referenced-dosy-nmr-a-novel-analytical-method-in-revealing-the-solution-structure-of-lithium-ion-battery-electrolytes
#4
Chi-Cheung Su, Meinan He, Rachid Amine, Zonghai Chen, Khalil Amine
A novel methodology is reported on the use of internally referenced diffusion-ordered spectroscopy (IR-DOSY) in divulging the solution structure of lithium-ion battery electrolytes. Toluene was utilized as the internal reference for 1H-DOSY analysis due to its exceptionally low donor number and reasonable solubility in various electrolytes. With the introduction of the internal reference, the solvent coordination ratio of different species in the electrolytes can be easily determined by 1H-DOSY or 7Li-DOSY...
June 14, 2018: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/29901387/mos2-nanosheets-vertically-grown-on-the-carbonized-corn-stalks-as-lithium-ion-battery-anode
#5
Luxiang Ma, Binglu Zhao, Xusheng Wang, Junfeng Yang, Xin-Xiang Zhang, Yuan Zhou, Jitao Chen
In the work, MoS2 nanosheets are vertically grown on the inside and outside surfaces of the carbonized corn stalks (CCS) by a simple hydrothermal reaction. The vertically grown structure can not only improve the transmission rate of Li+ and electrons but also avoid the agglomeration of the nanosheets. Meanwhile, a new approach of biomass source application is presented. We use CCS instead of graphite powders, which can not only avoid the exploitation of graphite resources, but also be used as a matrix for MoS2 growth to prevent the electrode from being further decomposition during long cycles and high currents density...
June 14, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29897229/exploring-pvfm-based-janus-membrane-supporting-gel-polymer-electrolyte-for-highly-durable-li-o-2-batteries
#6
Nan Meng, Fang Lian, Yadi Li, Xiaofeng Zhao, Li Zhang, Shigang Lu, Hong Li
Electrolyte is the key to constructing the ionic transport paths and O2 gas diffusion routes in the cathode as well as maintaining the electrode interfacial stability in view of the complex chemistry of Li-O2 batteries. A novel polyvinyl formal (PVFM)-based Janus membrane, which is prepared via coating multi walled carbon nanotubes (MWCNTs) on the porous side of the crosslinked PVFM membrane, has been proposed herein to achieve membrane-supporting gel polymer electrolyte (GPE) for Li-O2 batteries. Within Li-O2 batteries, the dense side of PVFM-based Janus membrane demonstrates a good compatibility with lithium metal anode...
June 13, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29891822/wheat-straw-derived-n-o-and-s-tri-doped-porous-carbon-with-ultrahigh-specific-surface-area-for-lithium-sulfur-batteries
#7
Feng Chen, Lulu Ma, Jiangang Ren, Mou Zhang, Xinyu Luo, Bing Li, Zhiming Song, Xiangyang Zhou
Recently, lithium-sulfur (Li-S) batteries have been greeted by a huge ovation owing to their very high theoretical specific capacity (1675 mAh·g−1 ) and theoretical energy density (2600 Wh·kg−1 ). However, the full commercialization of Li-S batteries is still hindered by dramatic capacity fading resulting from the notorious “shuttle effect” of polysulfides. Herein, we first describe the development of a facile, inexpensive, and high-producing strategy for the fabrication of N-, O-, and S-tri-doped porous carbon (NOSPC) via pyrolysis of natural wheat straw, followed by KOH activation...
June 11, 2018: Materials
https://www.readbyqxmd.com/read/29884906/high-capacity-and-stable-all-solid-state-li-ion-battery-using-sno-2-embedded-nanoporous-carbon
#8
Hiroo Notohara, Koki Urita, Hideyuki Yamamura, Isamu Moriguchi
Extensive research efforts are devoted to development of high performance all-solid-state lithium ion batteries owing to their potential in not only improving safety but also achieving high stability and high capacity. However, conventional approaches based on a fabrication of highly dense electrode and solid electrolyte layers and their close contact interface is not always applicable to high capacity alloy- and/or conversion-based active materials such as SnO2 accompanied with large volume change in charging-discharging...
June 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29883121/hierarchically-porous-n-s-codoped-carbon-embedded-dual-phase-mno-mns-nanoparticles-for-efficient-lithium-ion-storage
#9
Yujie Wang, Hao Wu, Ling Huang, Hang Zhao, Zhifang Liu, Xianchun Chen, Heng Liu, Yun Zhang
An intriguingly nanostructured composite comprising of MnO/MnS nanoparticles embedded in an N,S-codoped carbon frame (MnO/MnS@C) is designed here and employed as a promising Li-ion storage electrode material to address the challenge of inferior conductivity and large volume change toward manganese chalcogenide-based anode. Combining with the merits of coherent MnO/MnS, elaborately hierarchical-porous architecture and N,S-codoped carbon frame, this composite exhibits high lithium-ion storage capacity (591 mAh g-1 at 0...
June 8, 2018: Inorganic Chemistry
https://www.readbyqxmd.com/read/29882645/flexible-rechargeable-zn-air-batteries-based-on-multifunctional-heteronanomat-architecture
#10
Donggue Lee, Hyun-Woo Kim, Ju-Myung Kim, Ka-Hyun Kim, Sang-Young Lee
The increasing demand for advanced rechargeable batteries spurs development of new power sources beyond currently the most widespread lithium-ion batteries. Here, we demonstrate a new class of flexible/rechargeable zinc (Zn)-air batteries based on multifunctional heteronanomat architecture as a scalable/versatile strategy to address this issue. In contrast to conventional electrodes that are mostly prepared by slurry casting techniques, heteronanomat (denoted as "HM") framework-supported electrodes are fabricated through one-pot concurrent electrospraying (for electrode powders/single-walled carbon nanotubes (SWCNTs)) and electrospinning (for polyetherimide (PEI) nanofibers) process...
June 8, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29879310/rational-design-of-low-cost-and-high-energy-lithium-batteries-through-tailored-fluorine-free-electrolyte-and-nanostructured-sulfur-carbon-composite
#11
Marco Agostini, Du Hyun Lim, Matthew Sadd, Jang-Yeon Hwang, Segio Brutti, Jungwon Heo, Jou-Hyeon Ahn, Yang-Kook Sun, Aleksandar Matic
We report a new lithium/sulfur cell concept based on an optimized fluorine-free catholyte solution and a high loading nanostructured carbon/sulfur composite cathode. The Li2S8 present in the electrolyte ensures both buffering against active material dissolution and Li+ conduction. The high sulfur loading is obtained by confining elemental sulfur (~80%) in the mesopores of a highly ordered CMK3 carbon. With this concept we demonstrate stabilization of high energy density and excellent cycling performance over 500 cycles...
June 7, 2018: ChemSusChem
https://www.readbyqxmd.com/read/29878745/the-critical-role-of-the-crystallite-size-in-nanostructured-li4ti5o12-anodes-for-lithium-ion-batteries
#12
Junpei Yue, Felix M Badaczewski, Pascal Voepel, Thomas Leichtweiß, Doreen Mollenhauer, Wolfgang G Zeier, Bernd M Smarsly
Lithium titanate Li4 Ti5 O12 (LTO) is regarded as a promising alternative to carbon-based anodes in lithium-ion batteries. Despite its stable structural framework, LTO exhibits disadvantages such as the sluggish lithium-ion diffusion and poor electronic conductivity. In order to modify the performance of LTO as an anode material, nanosizing constitutes a promising approach, and the impact is studied here by systematical experimental approach. Phase-pure polycrystalline LTO nanoparticles (NPs) with high crystallinity and crystallite sizes ranging from 4 to 12 nm are prepared by an optimized solvothermal protocol and characterized by several state-of-the-art technologies including HRTEM, XRD, PDF (pair distribution function) analysis, Raman spectroscopy and XPS...
June 7, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29876221/high-ion-conducting-solid-state-composite-electrolytes-with-carbon-quantum-dot-nanofillers
#13
Cheng Ma, Kuan Dai, Hongshuai Hou, Xiaobo Ji, Libao Chen, Douglas G Ivey, Weifeng Wei
Solid-state polymer electrolytes (SPEs) with high ionic conductivity are desirable for next generation lithium- and sodium-ion batteries with enhanced safety and energy density. Nanoscale fillers such as alumina, silica, and titania nanoparticles are known to improve the ionic conduction of SPEs and the conductivity enhancement is more favorable for nanofillers with a smaller size. However, aggregation of nanoscale fillers in SPEs limits particle size reduction and, in turn, hinders ionic conductivity improvement...
May 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/29874040/record-alkali-metal-intercalation-by-highly-charged-corannulene
#14
Alexander V Zabula, Sarah N Spisak, Alexander S Filatov, Andrey Yu Rogachev, Marina A Petrukhina
The need for advanced energy storage technologies demands the development of new functional materials. Novel carbon-rich and carbon-based materials of different structural topologies attract significant attention in this regard. Attractive systems include a unique class of bowl-shaped polycyclic aromatic hydrocarbons that map onto fullerene surfaces and are thus often referred to as fullerene fragments, buckybowls, or π-bowls. Importantly, carbon bowls are able to acquire multiple electrons in stepwise reduction reactions producing sets of successively reduced carbanions...
June 6, 2018: Accounts of Chemical Research
https://www.readbyqxmd.com/read/29873477/a-universal-strategy-to-prepare-sulfur-containing-polymer-composites-with-desired-morphologies-for-lithium-sulfur-batteries
#15
Shao-Zhong Zeng, Xierong Zeng, Wenxuan Tu, Haitao Huang, Liang Yu, Yuechao Yao, Nengzhi Jin, Qi Zhang, Jizhao Zou
Lithium-sulfur (Li-S) batteries are probably the most promising candidates for the next-generation batteries owing to their high energy density. However, Li-S batteries face severe technical problems where the dissolution of intermediate polysulfides is the biggest problem because it leads to the degradations of the cathode and the lithium anode, and finally the fast capacity decay. Compared with composites of elemental sulfur and other matrices, sulfur-containing polymers (SCP) have strong chemical bonds to sulfur and therefore show low dissolution of polysulfides...
June 6, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29873376/three-dimensional-porous-microspheres-comprising-hollow-fe-2-o-3-nanorods-cnt-building-blocks-with-superior-electrochemical-performance-for-lithium-ion-batteries
#16
Seung-Keun Park, Gi Dae Park, Yun Chan Kang
It is highly desirable to develop anode materials with rational architectures for lithium ion batteries to achieve high-performance electrochemical properties. In this study, three-dimensional porous composite microspheres comprising hollow Fe2O3 nanorods/carbon nanotube (CNT) building blocks are successfully constructed by direct deposition and further thermal transformation of beta-FeOOH nanorods on CNT porous microspheres. The CNT porous microsphere, which is prepared by a spray pyrolysis, provides ample sites for the direct growth of beta-FeOOH nanorods...
June 6, 2018: Nanoscale
https://www.readbyqxmd.com/read/29873343/understanding-transport-mechanisms-in-ionic-liquid-carbonate-solvent-electrolyte-blends
#17
K Oldiges, D Diddens, M Ebrahiminia, J B Hooper, I Cekic-Laskovic, A Heuer, D Bedrov, M Winter, G Brunklaus
To unravel mechanistic details of the ion transport in liquid electrolytes, blends of the ionic liquid (IL) 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide (Pyr14TFSI), ethylene carbonate (EC) and dimethyl carbonate (DMC) with the conducting salts lithium hexafluorophosphate (LiPF6) and lithium bis(trifluoromethylsulfonyl)imide (LiTFSI) were investigated as a function of the IL concentration. Electrochemical impedance, Pulsed Field Gradient Nuclear Magnetic Resonance (PFG NMR) and Raman spectroscopy supported by Molecular Dynamics (MD) simulations allowed the structural and dynamic correlations of the ion motions to be probed...
June 6, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29870590/hierarchical-mos2-carbon-composite-microspheres-as-advanced-anodes-for-lithium-sodium-ion-batteries
#18
Wangjia Tang, Xiuli Wang, Yu Zhong, Dong Xie, Xuqing Zhang, Xinhui Xia, Jianbo Wu, Changdong Gu, Jiangping Tu
It is crucial to design advanced electrodes with large Li/Na ion storage capacities for the development of next-generation battery systems. Herein, we construct hierarchical MoS2/C composite microspheres via a facile template-free self-assembly sulfurization plus post-carbonization. Cross-linked MoS2 nanosheets and outer carbon layer are organically combined together forming composite microspheres with diameters of 400-500 nm. Due to enhanced electrical conductivity and good structural stability, the designed MoS2/C composite microspheres exhibit substantially improved Li/Na ion storage performance...
June 5, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29870144/fe-catalyzed-graphitic-carbon-materials-from-biomass-resources-as-anodes-for-lithium-ion-batteries
#19
Aurora Gomez-Martin, Julian Martinez-Fernandez, Mirco Ruttert, Andreas Heckmann, Martin Winter, Tobias Placke, Joaquin Ramirez-Rico
Graphitized carbon materials from biomass resources were successfully synthesized by means of an iron catalyst, and their electrochemical performance as anode materials for lithium-ion batteries (LIBs) was investigated. Peak pyrolysis temperatures between 850 °C and 2000 ºC were covered to study the effect of crystallinity and microstructural parameters on the anodic behaviour, focusing on the first-cycle Coulombic efficiency, reversible specific capacity and rate performance. In terms of capacity, results at the highest temperatures are comparable to those of commercially used synthetic graphite derived from a petroleum coke precursor at higher temperatures, and up to two times than non-catalyzed biomass-derived carbons...
June 5, 2018: ChemSusChem
https://www.readbyqxmd.com/read/29866266/highly-stable-li-ion-selective-electrodes-based-on-noble-metal-nanostructured-layers-as-solid-contacts
#20
Francesca Criscuolo, Irene Taurino, Francesca Stradolini, Sandro Carrara, Giovanni De Micheli
Nowadays the development of stable and highly efficient Solid-Contact Ion-Selective Electrodes (SC-ISEs) attracts much attention in the research community because of the great expansion of portable analytical devices. In this work, we present highly stable Li+ all-solid-state ISEs exploiting noble metals nanostructures as ion-to-electron transducers. The detection of lithium is essential for therapeutic drug monitoring of bipolar patients. In addition, greater environmental exposure to this ion is occurring due to the large diffusion of lithium-ion batteries...
October 16, 2018: Analytica Chimica Acta
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