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https://www.readbyqxmd.com/read/30525449/materials-and-designs-for-power-supply-systems-in-skin-interfaced-electronics
#1
Jinghua Li, Jie Zhao, John A Rogers
Recent advances in materials chemistry and composite materials design establish the foundations for classes of electronics with physical form factors that bridge the gap between soft biological organisms and rigid microsystems technologies. Skin-interfaced platforms of this type have broad utility in continuous clinical-grade monitoring of physiological status, with the potential to significantly lower the cost and increase the efficacy of modern health care. Development of materials and device designs for power supply systems in this context is critically important, and it represents a rapidly expanding focus of research in the chemical sciences...
December 10, 2018: Accounts of Chemical Research
https://www.readbyqxmd.com/read/30516385/in-situ-formed-shields-enabling-li2co3-free-solid-electrolytes-a-new-route-to-uncover-the-intrinsic-lithiophilicity-of-garnet-electrolytes-for-dendrite-free-li-metal-batteries
#2
Jianfang Wu, Bo-Wei Pu, Da Wang, Siqi Shi, Ning Zhao, Xiangxin Guo, Xin Guo
Introduction of inorganic solid electrolytes is believed to be an ultimate strategy to dismiss dendritic Li in high-energy Li-metal batteries (LMBs), and garnet-type Li7La3Zr2O12 (LLZO) electrolytes are impressive candidates. However, the current density for stable Li plating/stripping in LLZO is still quite limited. Here we create in-situ formed Li-deficient shields by the high-temperature calcination at 900 °C. By this novel process, the formation of Li2CO3 on LLZO is restrained, and then we successfully obtain Li2CO3-free LLZO after removing the Li-deficient compounds...
December 5, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/30515895/double-layer-polymer-electrolyte-for-high-voltage-all-solid-state-rechargeable-batteries
#3
Weidong Zhou, Zhaoxu Wang, Yuan Pu, Yutao Li, Sen Xin, Xiaofang Li, Jianfeng Chen, John B Goodenough
No single polymer or liquid electrolyte has a large enough energy gap between the empty and occupied electronic states for both dendrite-free plating of a lithium-metal anode and a Li+ extraction from an oxide host cathode without electrolyte oxidation in a high-voltage cell during the charge process. Therefore, a double-layer polymer electrolyte is investigated, in which one polymer provides dendrite-free plating of a Li-metal anode and the other allows a Li+ extraction from an oxide host cathode without oxidation of the electrolyte in a 4 V cell over a stable charge/discharge cycling at 65 °C; a poly(ethylene oxide) polymer contacts the lithium-metal anode and a poly(N-methyl-malonic amide) contacts the cathode...
December 5, 2018: Advanced Materials
https://www.readbyqxmd.com/read/30513393/a-bifunctional-fluorophosphate-electrolyte-for-safer-sodium-ion-batteries
#4
Xiaoyu Jiang, Xingwei Liu, Ziqi Zeng, Lifen Xiao, Xinping Ai, Hanxi Yang, Yuliang Cao
Most of the currently developed sodium-ion batteries (SIBs) have potential safety hazards due to the use of highly volatile and flammable alkyl carbonate electrolytes. To overcome this challenge, we report an electrochemically compatible and nonflammable electrolyte, tris(2,2,2-trifluoroethyl) phosphate (TFEP) with low-concentration sodium bis(fluorosulfonyl)imide (0.9 M), which is designed not only to match perfectly with the hard carbon (HC) anode but also to enhance the thermal stability of SIBs. Experimental results and theoretical calculations reveal that TFEP molecules have a significantly low barrier to decompose before Na+ inserts into HC, forming a stable inorganic solid-electrolyte interface layer, thus improving the electrochemical and structural stabilities of HC anodes...
November 15, 2018: iScience
https://www.readbyqxmd.com/read/30500179/before-li-ion-batteries
#5
Martin Winter, Brian Barnett, Kang Xu
This Review covers a sequence of key discoveries and technical achievements that eventually led to the birth of the lithium-ion battery. In doing so, it not only sheds light on the history with the advantage of contemporary hindsight but also provides insight and inspiration to aid in the ongoing quest for better batteries of the future. A detailed retrospective on ingenious designs, accidental discoveries, intentional breakthroughs, and deceiving misconceptions is given: from the discovery of the element lithium to its electrochemical synthesis; from intercalation host material development to the concept of dual-intercalation electrodes; and from the misunderstanding of intercalation behavior into graphite to the comprehension of interphases...
November 30, 2018: Chemical Reviews
https://www.readbyqxmd.com/read/30489656/highly-improved-cycling-stability-of-anion-de-intercalation-in-the-graphite-cathode-for-dual-ion-batteries
#6
Wen-Hao Li, Qiu-Li Ning, Xiao-Tong Xi, Bao-Hua Hou, Jin-Zhi Guo, Yang Yang, Bin Chen, Xing-Long Wu
Conventional ion batteries utilizing metallic ions as the single charge carriers are limited by the insufficient abundance of metal resources. Although supercapacitors apply both cations and anions to store energy through absorption and/or Faradic reactions occurring at the interfaces of the electrode/electrolyte, the inherent low energy density hinders its application. The graphite-cathode-based dual-ion battery possesses a higher energy density due to its high working potential of nearly 5 V. However, such a battery configuration suffers from severe electrolyte decomposition and exfoliation of the graphite cathode, rendering an inferior cycle life...
November 29, 2018: Advanced Materials
https://www.readbyqxmd.com/read/30467972/self-standing-3d-cathodes-for-all-solid-state-thin-film-lithium-batteries-with-improved-interface-kinetics
#7
Qiuying Xia, Shuo Sun, Jing Xu, Feng Zan, Jili Yue, Qinghua Zhang, Lin Gu, Hui Xia
3D all-solid-state thin film batteries (TFBs) are proposed as an attractive power solution for microelectronics. However, the challenge in fabricating self-supported 3D cathodes constrains the progress in developing 3D TFBs. In this work, 3D LiMn2 O4 (LMO) nanowall arrays are directly deposited on conductive substrates by magnetron sputtering via controlling the thin film growth mode. 3D TFBs based on the 3D LMO nanowall arrays and 2D TFBs based on the planar LMO thin films are successfully fabricated using a lithium phosphorous oxynitride (LiPON) electrolyte and Li anode...
November 22, 2018: Small
https://www.readbyqxmd.com/read/30465729/atomically-well-ordered-structure-at-solid-electrolyte-and-electrode-interface-reduces-the-interfacial-resistance
#8
Susumu Shiraki, Tetsuroh Shirasawa, Tohru Suzuki, Hideyuki Kawasoko, Ryota Shimizu, Taro Hitosugi
Using synchrotron surface X-ray diffraction, we investigated the atomic structures of the interfaces of a solid electrolyte (Li3 PO4 ) and electrode (LiCoO2 ). We prepared two types of interfaces with high and low interface resistances; the low-resistance interface exhibited a flat and well-ordered atomic arrangement at the electrode surface, whereas the high-resistance interface showed a disordered interface. These results indicate that the crystallinity of LiCoO2 at the interface has a significant impact on interface resistance...
November 22, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/30462868/an-electron-ion-dual-conductive-alloy-framework-for-high-rate-and-high-capacity-solid-state-lithium-metal-batteries
#9
Chunpeng Yang, Hua Xie, Weiwei Ping, Kun Fu, Boyang Liu, Jiancun Rao, Jiaqi Dai, Chengwei Wang, Glenn Pastel, Liangbing Hu
The solid-state Li battery is a promising energy-storage system that is both safe and features a high energy density. A main obstacle to its application is the poor interface contact between the solid electrodes and the ceramic electrolyte. Surface treatment methods have been proposed to improve the interface of the ceramic electrolytes, but they are generally limited to low-capacity or short-term cycling. Herein, an electron/ion dual-conductive solid framework is proposed by partially dealloying the Li-Mg alloy anode on a garnet-type solid-state electrolyte...
November 21, 2018: Advanced Materials
https://www.readbyqxmd.com/read/30455289/elastic-and-li-ion-percolating-hybrid-membrane-stabilizes-li-metal-plating
#10
Quan Pang, Laidong Zhou, Linda F Nazar
Lithium metal batteries are capable of revolutionizing the battery marketplace for electrical vehicles, owing to the high capacity and low voltage offered by Li metal. Current exploitation of Li metal electrodes, however, is plagued by their exhaustive parasitic reactions with liquid electrolytes and dendritic growth, which pose concerns to both cell performance and safety. We demonstrate that a hybrid membrane, both elastic and Li+ -ion percolating, can stabilize Li plating/stripping with high Coulombic efficiency...
November 19, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/30444729/conformal-carbon-coating-on-ws-2-nanotubes-for-excellent-electrochemical-performance-of-lithium-ion-batteries
#11
Jinqiang Zhang, Hagit Sade, Yufei Zhao, Adrian T Murdock, Avi Bendavid, Jean-Paul Lellouche, Guoxiu Wang, Zhaojun Han
WS2 nanotubes with carbon coatings in a core-shell structure (i.e. WS2 @C) are synthesized through a facile method based on the Lewis acid-activated thioglycosylation chemistry. The obtained WS2 @C shows a conformal coverage of conductive amorphous carbon on the surface of WS2 after thermal treatment, with the thickness of carbon layer being controlled by adjusting the molar ratios of saccharide to nanotube during the synthesis process. When applied in lithium-ion batteries, the WS2 @C structures show higher reversible capacity of 638 mAh g-1 at a current density of 500 mA g-1 and significantly improved cycling stability as compared to the pristine WS2 nanotubes...
January 18, 2019: Nanotechnology
https://www.readbyqxmd.com/read/30413002/mixed-phase-mno%C3%A2-n-containing-graphene-composites-applied-as-electrode-active-materials-for-flexible-asymmetric-solid-state-supercapacitors
#12
Hsin-Ya Chiu, Chun-Pei Cho
MnO₂/N-containing graphene composites with various contents of Mn were fabricated and used as active materials for the electrodes of flexible solid-state asymmetric supercapacitors. By scanning electron microscopes (SEM), transmission electron microscope (TEM), energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectrometer (XPS), fourier-transform infrared spectroscopy (FTIR) and Raman spectra, the presence of MnO₂ and N-containing graphene was verified. The MnO₂ nanostructures decorated on the N-containing graphene were of α- and γ-mixed phases...
November 8, 2018: Nanomaterials
https://www.readbyqxmd.com/read/30406216/space-charge-layers-in-all-solid-state-batteries-important-or-negligible
#13
Niek J J de Klerk, Marnix Wagemaker
All-solid state batteries have the promise to increase the safety of Li-ion batteries. A prerequisite for high-performance all-solid-state batteries is a high Li-ion conductivity through the solid electrolyte. In recent decades, several solid electrolytes have been developed which have an ionic conductivity comparable to that of common liquid electrolytes. However, fast charging and discharging of all-solid-state batteries remains challenging. This is generally attributed to poor kinetics over the electrode-solid electrolyte interface because of poorly conducting decomposition products, small contact areas, or space-charge layers...
October 22, 2018: ACS applied energy materials
https://www.readbyqxmd.com/read/30398885/the-fate-of-water-at-the-electrochemical-interfaces-electrochemical-behavior-of-free-water-versus-coordinating-water
#14
Nicolas Dubouis, Alessandra Serva, Elodie Salager, Michael Deschamps, Mathieu Salanne, Alexis Grimaud
The water reduction that produces hydrogen is one key reaction for electrochemical energy storage. While it has been widely studied in traditional aqueous electrolytes for water splitting (electrolyzers), it also plays an important role for batteries. Indeed, the reduction of water at relatively high potential prevents the practical realization of high-voltage aqueous batteries, while water contamination is detrimental for organic battery electrolytes. Nevertheless, recent studies pointed toward the positive effect of traces of water for Li-air batteries as well as for the formation of solid-electrolyte interphase...
November 8, 2018: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/30387593/a-non-aqueous-metal-free-and-hybrid-electrolyte-li-ion-o2-battery-with-a-single-ion-conducting-separator
#15
Han Deng, Yu Qiao, Shichao Wu, Feilong Qiu, Na Zhang, Ping He, Haoshen Zhou
The rechargeable lithium-oxygen (Li-O2) batteries suffer from not only the low practical capacity, high overpentential at the oxygen cathode, but also the low lithium utilization and dendrite growth of the Li metal. In this work, by coupling the dual mediator catholyte and the carbonate-based anolyte for the high specific capacity Si anode, we propose a hybrid electrolyte design for the fabrication of Li-ion O2 batteries. A single ion conducting lithiated Nafion membrane is introduced to bridge the two electrolyte systems...
November 2, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/30384706/asymmetric-electrolytes-near-structured-dielectric-interfaces
#16
Huanxin Wu, Honghao Li, Francisco J Solis, Monica Olvera de la Cruz, Erik Luijten
The ion distribution of electrolytes near interfaces with dielectric contrast has important consequences for electrochemical processes and many other applications. To date, most studies of such systems have focused on geometrically simple interfaces, for which dielectric effects are analytically solvable or computationally tractable. However, all real surfaces display nontrivial structure at the nanoscale and have, in particular, a nonuniform local curvature. Using a recently developed, highly efficient computational method, we investigate the effect of surface geometry on ion distribution and interface polarization...
October 28, 2018: Journal of Chemical Physics
https://www.readbyqxmd.com/read/30369234/molecular-scale-structure-of-electrode-electrolyte-interfaces-the-case-of-platinum-in-aqueous-sulfuric-acid
#17
Cheng Hao Wu, Tod A Pascal, Artem Baskin, Huixin Wang, Hai-Tao Fang, Yi-Sheng Liu, Yi-Hsien Lu, Jinghua Guo, David Prendergast, Miquel B Salmeron
Knowledge of the molecular composition and electronic structure of electrified solid-liquid interfaces is key to understanding elemental processes in heterogeneous reactions. Using X-ray absorption spectroscopy in the interface-sensitive electron yield mode (EY-XAS), first-principles electronic structure calculations, and multiscale simulations, we determined the chemical composition of the interfacial region of a polycrystalline platinum electrode in contact with aqueous sulfuric acid solution at potentials between the hydrogen and oxygen evolution reactions...
November 28, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/30369068/core-shell-hybrid-nanowires-with-protein-enabling-fast-ion-conduction-for-high-performance-composite-polymer-electrolytes
#18
Xuewei Fu, Yu Wang, Xin Fan, Louis Scudiero, Wei-Hong Zhong
Incorporating nanofillers is one of the promising approaches for simultaneously boosting the ionic conductivity and mechanical properties of solid polymer electrolytes (SPEs). However, effectively creating faster ion-conduction pathways via nanofillers still remains a big challenge. Herein, core-shell protein-ceramic nanowires for more efficiently building fast ion-conduction networks in SPEs are reported. The core-shell protein-ceramic nanowires are fabricated via in situ growth of protein coating on the electrospun TiO2 nanowires in a subtly controlled protein-denaturation process...
October 17, 2018: Small
https://www.readbyqxmd.com/read/30368930/borohydride-scaffolded-li-na-mg-fast-ionic-conductors-for-promising-solid-state-electrolytes
#19
REVIEW
Jing Cuan, You Zhou, Tengfei Zhou, Shigang Ling, Kun Rui, Zaiping Guo, Huakun Liu, Xuebin Yu
Borohydride solid-state electrolytes with room-temperature ionic conductivity up to ≈70 mS cm-1 have achieved impressive progress and quickly taken their place among the superionic conductive solid-state electrolytes. Here, the focus is on state-of-the-art developments in borohydride solid-state electrolytes, including their competitive ionic-conductive performance, current limitations for practical applications in solid-state batteries, and the strategies to address their problems. To open, fast Li/Na/Mg ionic conductivity in electrolytes with BH4 - groups, approaches to engineering borohydrides with enhanced ionic conductivity, and later on the superionic conductivity of polyhedral borohydrides, their correlated conductive kinetics/thermodynamics, and the theoretically predicted high conductive derivatives are discussed...
October 10, 2018: Advanced Materials
https://www.readbyqxmd.com/read/30354154/cationic-hofmeister-series-of-wettability-alteration-in-mica-water-alkane-systems
#20
Bijoyendra Bera, Naveen Kumar, Michael H G Duits, Martien Abraham Cohen Stuart, Frieder Mugele
The specific interaction of ions with macromolecules and solid-liquid interfaces is of crucial importance to many processes in biochemistry, colloid science, and engineering, as first pointed out by Hofmeister in the context of (de)stabilization of protein solutions. Here, we use contact angle goniometry to demonstrate that the macroscopic contact angle of aqueous chloride salt solutions on mica immersed in ambient alkane increases from near-zero to values exceeding $10^o$, depending on the type and concentration of cations and pH...
October 24, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
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