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https://www.readbyqxmd.com/read/30339445/oxygen-electromigration-and-energy-band-reconstruction-induced-by-electrolyte-field-effect-at-oxide-interfaces
#1
S W Zeng, X M Yin, T S Herng, K Han, Z Huang, L C Zhang, C J Li, W X Zhou, D Y Wan, P Yang, J Ding, A T S Wee, J M D Coey, T Venkatesan, A Rusydi, A Ariando
Electrolyte gating is a powerful means for tuning the carrier density and exploring the resultant modulation of novel properties on solid surfaces. However, the mechanism, especially its effect on the oxygen migration and electrostatic charging at the oxide heterostructures, is still unclear. Here we explore the electrolyte gating on oxygen-deficient interfaces between SrTiO_{3} (STO) crystals and LaAlO_{3} (LAO) overlayer through the measurements of electrical transport, x-ray absorption spectroscopy, and photoluminescence spectra...
October 5, 2018: Physical Review Letters
https://www.readbyqxmd.com/read/30338662/solid-polymer-electrolyte-coated-titania-nanotube-macroporous-photoelectrode-for-gas-phase-water-splitting
#2
Fumiaki Amano, Hyosuke Mukohara, Ayami Shintani, Kenyou Tsurui
Photoelectrochemical (PEC) water vapor splitting using n-type semiconductor electrodes with a proton exchange membrane (PEM) enabled pure hydrogen production from humidity in the ambient air. We proved a design concept that the gas-electrolyte-semiconductor triple-phase boundary on a nanostructured photoanode is important for the photoinduced gas-phase reaction. A surface coating of solid polymer electrolyte on a titania nanotube array (TNTA) macroporous electrode markedly enhanced the incident photon-to-current conversion efficiency (IPCE) at the gas-solid interface...
October 18, 2018: ChemSusChem
https://www.readbyqxmd.com/read/30336048/x-ray-photoelectron-spectroscopy-of-fast-frozen-hematite-colloids-in-aqueous-solutions-6-sodium-halide-f-cl-br-i-ion-binding-on-microparticles
#3
Marie Lucas, Merve Yeşilbaş, Andrey Shchukarev, Jean-François Boily
Electrolyte ion binding at mineral surfaces is central to the generation of surface charge and key to electric double layer formation. X-ray photoelectron spectroscopy (XPS) of fast-frozen (-170°C) mineral wet pastes provides a means to study weakly bound electrolyte ions at the mineral/water interface. In this study, we build upon a series of articles devoted to ion binding at hematite (-Fe2O3) particle surfaces to resolve the nature of sodium halide ion binding. Measurements on mi-cron-sized hematite particles terminated by the charged and amphoteric (012) and the relatively un-charged (001) faces points to the formation of salt loadings of similar composition to those of cry-osalts of NaCl, NaBr, NaI and NaF...
October 18, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/30335937/structure-and-electrolyte-sensitivity-in-co-2-electroreduction
#4
Rosa M Arán-Ais, Dunfeng Gao, Beatriz Roldan Cuenya
The utilization of fossil fuels (i.e., coal, petroleum, and natural gas) as the main energy source gives rise to serious environmental issues, including global warming caused by the continuously increasing level of atmospheric CO2 . To deal with this challenge, fossil fuels are being partially replaced by renewable energy such as solar and wind. However, such energy sources are usually intermittent and currently constitute a very low portion of the overall energy consumption. Recently, the electrochemical conversion of CO2 to chemicals and fuels with high energy density driven by electricity derived from renewable energy has been recognized as a promising strategy toward sustainable energy...
October 18, 2018: Accounts of Chemical Research
https://www.readbyqxmd.com/read/30307189/structure-formation-and-surface-chemistry-of-ionic-liquids-on-model-electrode-surfaces-model-studies-for-the-electrode-electrolyte-interface-in-li-ion-batteries
#5
Florian Buchner, Benedikt Uhl, Katrin Forster-Tonigold, Joachim Bansmann, Axel Groß, R Jürgen Behm
Ionic liquids (ILs) are considered as attractive electrolyte solvents in modern battery concepts such as Li-ion batteries. Here we present a comprehensive review of the results of previous model studies on the interaction of the battery relevant IL 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide ([BMP]+ [TFSI]- ) with a series of structurally and chemically well-defined model electrode surfaces, which are increasingly complex and relevant for battery applications [Ag(111), Au(111), Cu(111), pristine and lithiated highly oriented pyrolytic graphite (HOPG), and rutile TiO2 (110)]...
May 21, 2018: Journal of Chemical Physics
https://www.readbyqxmd.com/read/30307178/nmr-relaxometric-probing-of-ionic-liquid-dynamics-and-diffusion-under-mesoscopic-confinement-within-bacterial-cellulose-ionogels
#6
Chip J Smith, Sascha Gehrke, Oldamur Hollóczki, Durgesh V Wagle, Mark P Heitz, Gary A Baker
Bacterial cellulose ionogels (BCIGs) represent a new class of material comprising a significant content of entrapped ionic liquid (IL) within a porous network formed from crystalline cellulose microfibrils. BCIGs suggest unique opportunities in separations, optically active materials, solid electrolytes, and drug delivery due to the fact that they can contain as much as 99% of an IL phase by weight, coupled with an inherent flexibility, high optical transparency, and the ability to control ionogel cross-sectional shape and size...
May 21, 2018: Journal of Chemical Physics
https://www.readbyqxmd.com/read/30307068/engineering-the-interface-of-carbon-electrocatalysts-at-the-triple-point-for-enhanced-oxygen-reduction-reaction
#7
Mo Qiao, Maria-Magdalena Titirici
Aqueous oxygen reduction reaction (ORR) has recently received increasing attention due to its critical role in clean and sustainable energy generation technologies, such as Proton Exchange membranes (PEM) fuel cells, alkaline fuel cells and Zn-air batteries. The sluggish kinetics associated with ORR result from multistep electron transfer process. The slow kinetics are partially related to the O2 adsorption process onto the catalyst, which happens at the triple-phase boundary (TPB) of the electrocatalyst-electrolyte-oxygen interface...
October 11, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/30302834/interface-engineering-for-garnet-based-solid-state-lithium-metal-batteries-materials-structures-and-characterization
#8
REVIEW
Jiaqi Dai, Chunpeng Yang, Chengwei Wang, Glenn Pastel, Liangbing Hu
Lithium-metal batteries are considered one of the most promising energy-storage systems owing to their high energy density, but their practical applications have long been hindered by significant safety concerns and poor cycle stability. Solid-state electrolytes (SSEs) are expected to improve not only the safety but also the energy density of Li-metal batteries. The key challenge for solid-state Li-metal batteries lies in the low ionic conductivity of the SSEs and moreover the interface contact between the electrode and SSE...
October 9, 2018: Advanced Materials
https://www.readbyqxmd.com/read/30299954/achieving-fast-and-efficient-k-intercalation-on-ultrathin-graphene-electrodes-modified-by-a-li-based-solid-electrolyte-interphase
#9
Jingshu Hui, Noah B Schorr, Srimanta Pakhira, Zihan Qu, Jose L Mendoza-Cortes, Joaquín Rodríguez-López
Advancing beyond Li-ion batteries requires translating the beneficial characteristics of Li+ electrodes to attractive, yet incipient, candidates such as those based on K+ intercalation. Here, we use ultrathin few-layer graphene (FLG) electrodes as a model interface to show a dramatic enhancement of K+ intercalation performance through a simple conditioning of the solid-electrolyte interphase (SEI) in a Li+ containing electrolyte. Unlike the substantial plating occurring in K+ containing electrolytes, we found that a Li+ based SEI enabled efficient K+ intercalation with discrete staging-type phase transitions observed via cyclic voltammetry at scan rates up to 100 mVs-1 and confirmed as ion-intercalation processes through in situ Raman spectroscopy...
October 9, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/30299927/licrs2-and-limns2-cathodes-with-extraordinary-mixed-electron-ion-conductivities-and-favorable-interfacial-compatibilities-with-sulfide-electrolyte
#10
Zhen-Ming Xu, Shou-Hang Bo, Hong Zhu
Sulfide-type solid-state electrolytes for all-solid-state lithium ion batteries are capturing more and more attentions. However, the electronegativity difference between oxygen and sulfur element makes sulfide-type solid-state electrolytes chemically incompatible with the conventional LiCoO2 cathode. In this work, we proposed a series of chalcopyrite-structured sulfide-type materials, and systematically assessed their performances as the cathode materials in ASSLIBs by first-principles calculations. All the five metallic LiMS2 (M = Cr, Mn, Fe, Co and Ni) materials are superionic conductors with extremely small lithium ion migration barriers in the range of 43 to 99 meV, much lower than most of oxide- and even sulfide-type cathodes...
October 9, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/30296106/poor-man-s-atomic-layer-deposition-of-lif-for-additive-free-growth-of-lithium-columns
#11
Wesley Chang, Jeung Hun Park, Daniel A Steingart
Lithium metal is an ideal material for high-energy, cost-effective rechargeable energy storage systems. The thermodynamically unfavorable solid-liquid interface between the lithium metal and organic electrolyte necessitates the formation of an interlayer (SEI) which is known to have significant impact on lithium morphologies. Less well understood is the impact of the current collector substrate on the morphology of electrodeposited lithium. Here we report on the morphology of electrodeposited lithium as a function of the chemical pretreatments of the working electrode...
October 18, 2018: Nano Letters
https://www.readbyqxmd.com/read/30294814/exploring-self-healing-liquid-na-k-alloy-for-dendrite-free-electrochemical-energy-storage
#12
Liyuan Zhang, Xinhui Xia, Yu Zhong, Dong Xie, Sufu Liu, Xiuli Wang, Jiangping Tu
The development of high-performance dendrite-free liquid-metal anodes at room temperature is of great importance for the advancement of alkali metal batteries. Herein an intriguing self-healing liquid dendrite-free Na-K alloy, fabricated by a facile room-temperature alloying process, aiming for application in potassium-ion batteries is reported. Through extensive investigation, its self-healing characteristics are rooted upon a thin solid K2 O layer (KOL) coated on the liquid Na-K alloy. The KOL not only acts as a protective layer to prevent the Na-K alloy from making contact with the electrolyte, but also greatly improves the wetting capability and adhesion between the liquid alloy and the carbon matrix (e...
October 8, 2018: Advanced Materials
https://www.readbyqxmd.com/read/30281275/assessing-substitution-effects-on-surface-chemistry-by-in-situ-ambient-pressure-xps-on-perovskite-thin-films-bacexzr0-9-xy0-1o2-95-x-0-0-2-0-9
#13
Angelique Jarry, Sandrine Ricote, Aaron Geller, Christopher Pellegrinelli, Xiaohang Zhang, David M Stewart, Ichiro Takeuchi, Eric D Wachsman, Ethan J Crumlin, Bryan W Eichhorn
Performance of Proton-Solid Oxide Fuel Cells (H+-SOFC) is governed by ion transport through solid/gas interfaces. Major breakthroughs are then intrinsically linked to a detailed understanding of how parameters tailoring bulk proton conductivity affect surface chemistry in situ, at an early stage. In this work, we studied proton and oxygen transport at the interface between H+-SOFC electrolyte BaCexZr0.9-xY0.1O2.95 (x = 0; 0.2; 0.9) thin films and the gas (100 mtorr of H2O and O2) by using synchrotron-based ambient pressure X-ray photoelectron spectroscopy (APXPS) at operating temperature (>400°C)...
October 3, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/30277255/fabrication-and-understanding-of-cu-3-si-si-carbon-graphene-nanocomposites-as-high-performance-anodes-for-lithium-ion-batteries
#14
Zhiming Zheng, Hong-Hui Wu, Huixin Chen, Yong Cheng, Qiaobao Zhang, Qingshui Xie, Laisen Wang, Kaili Zhang, Ming-Sheng Wang, Dong-Liang Peng, Xiao Cheng Zeng
Besides silicon's low electronic conductivity, another critical issue for using silicon as the anode for lithium-ion batteries (LIBs) is the dramatic volume variation (>300%) during lithiation/delithiation processes, which can lead to rapid capacity fading and poor rate capability, thereby hampering silicon's practical applications in batteries. To mitigate these issues, herein, we report our findings on the design and understanding of a self-supported Cu3Si-Si@carbon@graphene (Cu3Si-SCG) nanocomposite anode...
October 2, 2018: Nanoscale
https://www.readbyqxmd.com/read/30277019/enabling-reversible-de-lithiation-of-aluminum-via-the-use-of-bis-fluorosulfonyl-imide-based-electrolytes
#15
Bingsheng Qin, Sangsik Jeong, Huang Zhang, Ulderico Ulissi, Diogo Vieira Carvalho, Alberto Varzi, Stefano Passerini
Aluminum, a cost-effective and abundant metal capable of alloying with Li up to ~1000 mAh/g, is a very appealing anode material for high energy density lithium ion batteries (LIBs). However, despite the repeated efforts in the past three decades, reports presenting stable cycling performance are extremely rare. In this letter, we report our recent findings on the highly reversible (de-)lithiation of micro-sized Al anode (m-Al) enabled by the use of bis(fluorosulfonyl)imide (FSI)-based electrolytes. Using this kind of electrolytes, m-Al can deliver a specific capacity over 900 mAh/g and superior Coulombic efficiency (96...
October 1, 2018: ChemSusChem
https://www.readbyqxmd.com/read/30252011/a-promising-pmhs-peo-blend-polymer-electrolyte-for-all-solid-state-lithium-ion-batteries
#16
Yi-Jing Li, Chao-Ying Fan, Jing-Ping Zhang, Xing-Long Wu
Solid-state lithium metal batteries have emerged as a promising alternative to existing liquid Li-ion batteries and can power the future storage market considering their higher energy outputs and better safety. Among various solid electrolytes, polymer electrolytes have received more attention due to their potential advantages, including wide electrochemical windows, ease of processing, low interface impedance and low cost. Polymeric electrolytes based on poly(ethylene oxide) (PEO) as a well-known polymer matrix have been extensively studied because of their highly flexible EO segments in the amorphous phase that can provide channels for lithium ion transport...
September 25, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/30250778/simultaneous-suppression-of-the-dendrite-formation-and-shuttle-effect-in-a-lithium-sulfur-battery-by-bilateral-solid-electrolyte-interface
#17
Ling Fan, Suhua Chen, Jingyi Zhu, Ruifang Ma, Shuping Li, Ramakrishna Podila, Apparao M Rao, Gongzheng Yang, Chengxin Wang, Qian Liu, Zhi Xu, Lixia Yuan, Yunhui Huang, Bingan Lu
Although the reversible and inexpensive energy storage characteristics of the lithium-sulfur (Li-S) battery have made it a promising candidate for electrical energy storage, the dendrite growth (anode) and shuttle effect (cathode) hinder its practical application. Here, it is shown that new electrolytes for Li-S batteries promote the simultaneous formation of bilateral solid electrolyte interfaces on the sulfur-host cathode and lithium anode, thus effectively suppressing the shuttle effect and dendrite growth...
September 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/30250202/a-room-temperature-sodium-sulfur-battery-with-high-capacity-and-stable-cycling-performance
#18
Xiaofu Xu, Dong Zhou, Xianying Qin, Kui Lin, Feiyu Kang, Baohua Li, Devaraj Shanmukaraj, Teofilo Rojo, Michel Armand, Guoxiu Wang
High-temperature sodium-sulfur batteries operating at 300-350 °C have been commercially applied for large-scale energy storage and conversion. However, the safety concerns greatly inhibit their widespread adoption. Herein, we report a room-temperature sodium-sulfur battery with high electrochemical performances and enhanced safety by employing a "cocktail optimized" electrolyte system, containing propylene carbonate and fluoroethylene carbonate as co-solvents, highly concentrated sodium salt, and indium triiodide as an additive...
September 24, 2018: Nature Communications
https://www.readbyqxmd.com/read/30247014/enabling-lithium-metal-anode-encapsulated-in-a-3d-carbon-skeleton-with-a-superior-rate-performance-and-capacity-retention-in-full-cells
#19
XiaoHui Zhou, WuJun Huang, ChenGuang Shi, Kang Wang, Rui Zhang, JinCheng Guo, YanFen Wen, ShaoJian Zhang, Qiong Wang, Ling Huang, JunTao Li, XiaoDong Zhou, ShiGang Sun
Suppressing the formation of lithium (Li) dendrites is central to implementing Li-metal anode, which has gained growing attention due to its ultrahigh specific capacity and low redox potential. Here, a novel approach is adopted to deposit Li-metal within a rigid three-dimensional (3D) carbon paper (3DCP) network, which consists of a cross-link framework of carbon fibers and graphene nanosheets (GNs). This unique structure yields a uniform distribution of Li-nuclei during the preliminary stage of Li-plating and the formation of a stable solid-electrolyte interface...
October 5, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/30232876/sn-co-nanoalloys-encapsulated-in-n-doped-carbon-hollow-cubes-as-a-high-performance-anode-material-for-lithium-ion-batteries
#20
Juan Yang, Jiaming Zhang, Xiangyang Zhou, Yongpeng Ren, Min Jiang, Jingjing Tang
To address the huge volumetric change and unstable solid electrolyte interphase (SEI) issues of Sn-based anodes, this paper proposes a Sn-Co-C ternary composite with a cubic yolk-shell structure. The proposed Sn-Co nanoalloys encapsulated in N-doped carbon hollow cubes (Sn-Co@C) are simply synthesized by the conformal polydopamine coating of home-made CoSn(OH)6 hollow nanocubes subsequent with hydrogen reduction. The cubic Sn-Co@C yolk-shell structure possessing an optimized carbon shell thickness displays excellent cyclic performance and superior rate capability when utilized as an anode for lithium-ion batteries...
October 2, 2018: ACS Applied Materials & Interfaces
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