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https://www.readbyqxmd.com/read/30103135/flexible-hybrid-yarn-shaped-supercapacitors-based-on-porous-nickel-cobalt-sulfide-nanosheet-array-layers-on-gold-metalized-cotton-yarns
#1
Hai-Tao Wang, Ya-Nan Liu, Xiao-Hui Kang, Yi-Fan Wang, Shi-Yi Yang, Shao-Wei Bian, Quan Zhu
A high-performance yarn-shaped supercapacitor electrode material with light weight, small volume, flexibility and low cost, is highly desirable for the development of flexible energy storage devices. Herein, a cotton/Au/nickel cobalt sulfide hybrid yarn electrode was designed and synthesized by electrodepositing nickel cobalt sulfide nanosheet arrays on the Au metalized cotton yarn. The metalized cotton yarn as a conductive substrate ensures rapid electron transportation. The porous layer which constructed by CoNi2 S4 nanosheet arrays significantly enlarges the interface between the electrolyte ions and electrode materials, providing large electroactive surface area for the faradic redox reactions...
August 4, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/30094988/bi-functional-role-of-lino3-in-li-o2-batteries-de-convoluting-surface-and-catalytic-effects
#2
Rosy Sharma, Sabine Akabayov, Michal Leskes, Malachi Noked
Out of many challenges in the realization of lithium-O2 batteries (LOB), the major is to deal with the instability of the electrolyte and the cathode interface under the stringent environment of both oxygen reduction and evolution reactions. Lithium nitrate was recently proposed as a promising salt for LOB, due to its capability to stabilize lithium anode by formation of solid electrolyte interphase (SEI), its low level of dissociation in aprotic solvents and its catalytic effect towards OER in rechargeable LOB...
August 10, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/30091844/a-smart-flexible-solid-state-photovoltaic-device-with-interfacial-cooling-recovery-feature-through-thermoreversible-polymer-gel-electrolyte
#3
Keval K Sonigara, Hiren K Machhi, Jayraj V Vaghasiya, Alain Gibaud, Swee Ching Tan, Saurabh S Soni
Quasi-solid-state dye-sensitized solar cells (DSSCs) fabricated with lightweight flexible substrates have a great potential in wearable electronic devices for in situ powering. However, the poor lifespan of these DSSCs limits their practical application. Strong mechanical stresses involved in practical applications cause breakage of the electrode/electrolyte interface in the DSSCs greatly affecting their performance and lifetime. Here, a mechanically robust, low-cost, long-lasting, and environment-friendly quasi-solid-state DSSC using a smart thermoreversible water-based polymer gel electrolyte with self-healing characteristics at a low temperature (below 0 °C) is demonstrated...
August 9, 2018: Small
https://www.readbyqxmd.com/read/30091585/introducing-artificial-solid-electrolyte-interphase-onto-the-anode-of-aqueous-lithium-energy-storage-systems
#4
Moin Ahmed, Alireza Zehtab Yazdi, Aly Mitha, Pu Chen
Aqueous lithium energy storage systems (ALESS) offer several advantages over the commercially available non-aqueous systems, most noteworthy higher ionic conductivity, safety and environmentally friendly. The ALESS, however, exhibit faster capacity fading than their non-aqueous counterparts after repeated cycles of charge and discharge; this limits their wide-range applications. Excessive corrosion of metallic anodes in the aqueous electrolyte and accelerated growth of dendrites during the charge/discharge process are found to be the main reasons that severely impact ALESS's lifespan...
August 9, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/30088847/salt-based-organic-inorganic-nanocomposites-towards-a-stable-lithium-metal-li%C3%A2-%C3%A2-gep%C3%A2-s%C3%A2-%C3%A2-solid-electrolyte-interface
#5
Yue Gao, Daiwei Wang, Yuguang Li, Zhaoxin Yu, Thomas Mallouk, Donghai Wang
Solid-state Li metal batteries technology is extremely attractive, owing to the high energy density, long lifespans, and better safety. A key obstacle in this technology is the unstable Li/solid-state electrolyte (SSE) interface involving electrolyte reduction by Li. Here we report a novel approach based on the use of a nanocomposite consisting of organic elastomeric salts (LiO-(CH₂O)n-Li) and inorganic nanoparticle salts (LiF, -NSO₂-Li, Li₂O), which serve as an interphase to protect Li₁₀GeP₂S₁₂ (LGPS), a highly conductive but reducible SSE...
August 8, 2018: Angewandte Chemie
https://www.readbyqxmd.com/read/30082767/new-insight-for-surface-chemistries-in-ultra-thin-self-assembled-monolayers-modified-high-voltage-spinel-cathodes
#6
Dae-Wook Kim, Shuhei Uchida, Hiromasa Shiiba, Nobuyuki Zettsu, Katsuya Teshima
The electrochemical properties of the interface between the spinel LiNi0.5 Mn1.5 O4-δ (LNMO4-δ ) cathodes and ethylene carbonate-dimethyl carbonate (EC-DMC) electrolyte containing 1 M of LiPF6 have been investigated to achieve high-voltage durability of LNMO4-δ /graphite full cells. Coating the LNMO4-δ crystal surface by a fluoroalkylsilane self-assembled monolayer with a thickness below 2 nm resulted in a capacity retention of 94% after 100 cycles at a rate of 1 C and suppression of capacity fading for both the cathode and anode of the full cell...
August 6, 2018: Scientific Reports
https://www.readbyqxmd.com/read/30082382/lithium-metal-stripping-beneath-the-solid-electrolyte-interphase
#7
Feifei Shi, Allen Pei, David Thomas Boyle, Jin Xie, Xiaoyun Yu, Xiaokun Zhang, Yi Cui
Lithium stripping is a crucial process coupled with lithium deposition during the cycling of Li metal batteries. Lithium deposition has been widely studied, whereas stripping as a subsurface process has rarely been investigated. Here we reveal the fundamental mechanism of stripping on lithium by visualizing the interface between stripped lithium and the solid electrolyte interphase (SEI). We observed nanovoids formed between lithium and the SEI layer after stripping, which are attributed to the accumulation of lithium metal vacancies...
August 6, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/30067038/interactions-between-lithium-an-ionic-liquid-and-si-111-surfaces-studied-by-x-ray-photoelectron-spectroscopy
#8
Zhen Liu, Guozhu Li, Andriy Borodin, Xiaoxu Liu, Yao Li, Frank Endres
Investigations of the solid-electrolyte interphase formation on a silicon anode are of great interest for future lithium-ion batteries. We have studied the interactions of the ionic liquid 1-octyl-3-methylimidazolium bis(trifluoromethylsulfonyl) amide ([OMIm]Tf2N) and of lithium with Si(111) surfaces on a molecular level by X-ray photoelectron spectroscopy. The interaction of Li with [OMIm]Tf2N on Si(111) results in the decomposition of both the cation and the anion and the intercalation of lithium. Lithium atoms donate the electrons to the [OMIm]+ cation, forming Li+, and at the same time the alkyl group is detached from the cation...
August 1, 2018: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/30062125/engineering-stable-interfaces-for-three-dimensional-lithium-metal-anodes
#9
Jin Xie, Jiangyan Wang, Hye Ryoung Lee, Kai Yan, Yuzhang Li, Feifei Shi, William Huang, Allen Pei, Gilbert Chen, Ram Subbaraman, Jake Christensen, Yi Cui
Lithium metal has long been considered one of the most promising anode materials for advanced lithium batteries (for example, Li-S and Li-O2 ), which could offer significantly improved energy density compared to state-of-the-art lithium ion batteries. Despite decades of intense research efforts, its commercialization remains limited by poor cyclability and safety concerns of lithium metal anodes. One root cause is the parasitic reaction between metallic lithium and the organic liquid electrolyte, resulting in continuous formation of an unstable solid electrolyte interphase, which consumes both active lithium and electrolyte...
July 2018: Science Advances
https://www.readbyqxmd.com/read/30037260/communication-computing-the-helmholtz-capacitance-of-charged-insulator-electrolyte-interfaces-from-the-supercell-polarization
#10
Chao Zhang
Supercell modeling of an electrical double layer (EDL) at electrified solid-electrolyte interfaces is a challenge. The net polarization of EDLs arising from the fixed chemical composition setup leads to uncompensated EDLs under periodic boundary condition and convolutes the calculation of the Helmholtz capacitance [C. Zhang and M. Sprik, Phys. Rev. B 94, 245309 (2016)]. Here we provide a new formula based on the supercell polarization at zero electric field Ē = 0 (i.e., standard Ewald boundary condition) to calculate the Helmholtz capacitance of charged insulator-electrolyte interfaces and validate it using atomistic simulations...
July 21, 2018: Journal of Chemical Physics
https://www.readbyqxmd.com/read/30035849/flexible-flame-resistant-and-dendrite-impermeable-gel-polymer-electrolyte-for-li-o-2-air-batteries-workable-under-hurdle-conditions
#11
Xiaohong Zou, Qian Lu, Yijun Zhong, Kaiming Liao, Wei Zhou, Zongping Shao
Gel-polymer electrolytes are considered as a promising candidate for replacing the liquid electrolytes to address the safety concerns in Li-O2 /air batteries. In this work, by taking advantage of the hydrogen bond between thermoplastic polyurethane and aerogel SiO2 in gel polymer, a highly crosslinked quasi-solid electrolyte (FST-GPE) with multifeatures of high ionic conductivity, high mechanical flexibility, favorable flame resistance, and excellent Li dendrite impermeability is developed. The resulting gel-polymer Li-O2 /air batteries possess high reaction kinetics and stabilities due to the unique electrode-electrolyte interface and fast O2 diffusion in cathode, which can achieve up to 250 discharge-charge cycles (over 1000 h) in oxygen gas...
July 23, 2018: Small
https://www.readbyqxmd.com/read/30035529/unravelling-the-interface-layer-formation-and-gas-evolution-suppression-on-a-tinb-2-o-7-anode-for-lithium-ion-batteries
#12
Xinzhan Wu, Shuaifeng Lou, Xinqun Cheng, Chunhua Lin, Jinlong Gao, Yulin Ma, Pengjian Zuo, Chunyu Du, Yunzhi Gao, Geping Yin
TiNb2 O7 (TNO) has been regarded as a promising anode material for high-power lithium-ion batteries because of the high theoretical capacity and rate performance within the operation voltage range of 1.0-3.0 V. Herein, the electrochemical performance and interface evolution of TNO are comprehensively investigated by scanning electron microscopy, high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, and Fourier transform infrared spectroscopy. The prepared TNO shows a high initial reversible capacity of 256 mA h g-1 and a satisfactory capacity retention of 68...
August 2, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/30027045/an-ultrahigh-capacity-graphite-li-2-s-battery-with-holey-li-2-s-nanoarchitectures
#13
Fangmin Ye, Hyungjun Noh, Hongkyung Lee, Hee-Tak Kim
The pairing of high-capacity Li2 S cathode (1166 mAh g-1 ) and lithium-free anode (LFA) provides an unparalleled potential in developing safe and energy-dense next-generation secondary batteries. However, the low utilization of the Li2 S cathode and the lack of electrolytes compatible to both electrodes are impeding the development. Here, a novel graphite/Li2 S battery system, which features a self-assembled, holey-Li2 S nanoarchitecture and a stable solid electrolyte interface (SEI) on the graphite electrode, is reported...
July 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/30024004/spectroscopic-characterization-of-lithium-thiophosphates-by-xps-and-xas-a-model-to-help-monitor-interfacial-reactions-in-all-solid-state-batteries
#14
Christian Dietrich, Raimund Koerver, Michael W Gaultois, Gregor Kieslich, Giannantonio Cibin, Jürgen Janek, Wolfgang G Zeier
Inspired by reports of redox active interphases in all-solid-state batteries employing fast conducting lithium thiophosphate solid-state electrolytes, we investigated the compositional depolymerization of interconnected PS4 tetrahedra in (Li2S)x(P2S5)100-x glasses (50 < x < 80) by X-ray absorption spectroscopy (XAS) and X-ray photoelectron spectroscopy (XPS). Based on the observed energy shifts with composition, we present a structural model of the three different bonding types describing the structures of either crystalline or amorphous thiophosphates...
August 1, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29989790/porous-scandia-stabilized-zirconia-layer-for-enhanced-performance-of-reversible-solid-oxide-cells
#15
Muhammad Shirjeel Khan, Xiaoyong Xu, Ruth Knibbe, Zhonghua Zhu
Reversible solid oxide cells (RSOCs) developed so far display short-term stability during solid oxide electrolysis cell (SOEC) mode. This is due to the delamination of the strontium-doped lanthanum manganite (LSM) air electrode when tested for a long time. Here, we report a highly stable RSOC operation of LSM for 5 cycles using half and full cells. A scandia-stabilized zirconia (SSZ) porous layer was applied between the dense SSZ electrolyte and the porous LSM electrode. The half-cells were tested under ±0...
August 1, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29989392/stabilizing-li-10-snp-2-s-12-li-interface-via-an-in-situ-formed-solid-electrolyte-interphase-layer
#16
Bizhu Zheng, Jianping Zhu, Hongchun Wang, Min Feng, Ediga Umeshbabu, Yixiao Li, Qi-Hui Wu, Yong Yang
Despite the extremely high ionic conductivity, the commercialization of Li10 GeP2 S12 -type materials is hindered by the poor stability against Li metal. Herein, to address that issue, a simple strategy is proposed and demonstrated for the first time, i.e., in situ modification of the interface between Li metal and Li10 SnP2 S12 (LSPS) by pretreatment with specific ionic liquid and salts. X-ray photoelectron spectroscopy and electrochemical impedance spectroscopy results reveal that a stable solid electrolyte interphase (SEI) layer instead of a mixed conducting layer is formed on Li metal by adding 1...
August 1, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29989389/extremely-low-resistance-of-li-3-po-4-electrolyte-li-ni-0-5-mn-1-5-o-4-electrode-interfaces
#17
Hideyuki Kawasoko, Susumu Shiraki, Toru Suzuki, Ryota Shimizu, Taro Hitosugi
Solid-state Li batteries containing Li(Ni0.5 Mn1.5 )O4 as a 5 V-class positive electrode are expected to revolutionize mobile devices and electric vehicles. However, practical applications of such batteries are hampered by the high resistance at their solid electrolyte/electrode interfaces. Here, we achieved an extremely low electrolyte/electrode interface resistance of 7.6 Ω cm2 in solid-state Li batteries with Li(Ni0.5 Mn1.5 )O4 . Furthermore, we observed spontaneous migration of Li ions from the solid electrolyte to the positive electrode after the formation of the electrolyte/electrode interface...
August 1, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29985582/quantitative-analysis-of-microstructures-and-reaction-interfaces-on-composite-cathodes-in-all-solid-state-batteries-using-a-three-dimensional-reconstruction-technique
#18
Sungjun Choi, Minjae Jeon, Junsung Ahn, Wo Dum Jung, Sung Min Choi, Ji-Su Kim, Jaemin Lim, Yong-Jun Jang, Hun-Gi Jung, Jong-Ho Lee, Byoung-In Sang, Hyoungchul Kim
The composite cathode of an all-solid-state battery composed of various solid-state components requires a dense microstructure and a highly percolated solid-state interface different from that of a conventional liquid-electrolyte-based Li-ion battery. Indeed, the preparation of such a system is particularly challenging. In this study, quantitative analyses of composite cathodes by three-dimensional reconstruction analysis were performed beyond the existing qualitative analysis, and their microstructures and reaction interfaces were successfully analyzed...
July 18, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29975039/high-performance-all-solid-state-polymer-electrolyte-with-controllable-conductivity-pathway-formed-by-self-assembly-of-reactive-discogen-and-immobilized-via-a-facile-photopolymerization-for-a-lithium-ion-battery
#19
Shi Wang, Xu Liu, Ailian Wang, Zhinan Wang, Jie Chen, Qinghui Zeng, Xiaorui Jiang, Henghui Zhou, Liaoyun Zhang
All-solid-state polymer electrolytes (SPEs) have aroused great interests as one of the most promising alternatives for liquid electrolyte in the next-generation high-safety, and flexible lithium-ion batteries. However, some disadvantages of SPEs such as inefficient ion transmission capacity and poor interface stability result in unsatisfactory cyclic performance of the assembled batteries. Especially, the solid cell is hard to be run at room temperature. Herein, a novel and flexible discotic liquid-crystal (DLC)-based cross-linked solid polymer electrolyte (DLCCSPE) with controlled ion-conducting channels is fabricated via a one-pot photopolymerization of oriented reactive discogen, poly(ethylene glycol)diacrylate, and lithium salt...
August 1, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29970900/author-correction-investigation-on-the-interface-between-li-10-gep-2-s-12-electrolyte-and-carbon-conductive-agents-in-all-solid-state-lithium-battery
#20
Kyungho Yoon, Jung-Joon Kim, Won Mo Seong, Myeong Hwan Lee, Kisuk Kang
A correction to this article has been published and is linked from the HTML and PDF versions of this paper. The error has not been fixed in the paper.
July 4, 2018: Scientific Reports
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