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Douaa Farhat, Fouad Ghamouss, Julia Maibach, Kristina Edström, Daniel Lemordant
Recently, dinitriles (NC(CH2)nCN) and especially adiponitrile (ADN, n=4) have attracted the attention as secure electrolyte solvents due to their chemical stability, high boiling points, high flash points and low vapor pressure. The good solvating properties of ADN toward lithium salts and its high electrochemical stability (~ 6V vs. Li/Li+) make it suitable for safer Li-ions cells without performances loss. In this study, ADN is used as a single electrolyte solvent with lithium bis(trimethylsulfonyl)imide (LiTFSI)...
February 23, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
Ming Xu, Linfeng Fei, Wei-Bing Zhang, Tao Li, Wei Lu, Nian Zhang, Yanqing Lai, Zhian Zhang, Jing Fang, Kai Zhang, Jie Li, Haitao Huang
High-performance Li-rich layered oxide (LRLO) cathode material is appealing for next-generation Li-ion batteries owing to its high specific capacity (>300 mAh g-1). Despite intense studies in past decade, the low initial Coulombic efficiency and unsatisfactory cycling stability of LRLO still remain great challenges for its practical application. Here, we report a rational design of the orthogonally arranged {010}-oriented LRLO nanoplates with built-in anisotropic Li+ ion transport tunnels. Such a novel structure enables fast Li+ ion intercalation and deintercalation kinetics and enhanced structure stability for LRLO...
February 23, 2017: Nano Letters
Yinzhu Jiang, Yong Li, Peng Zhou, Zhenyun Lan, Yunhao Lu, Chen Wu, Mi Yan
Boosting power density is one of the primary challenges that current lithium ion batteries face. Alloying anodes that possess suitable potential windows stand at the forefront in pursuing ultrafast and highly reversible lithium storage to achieve high power/energy lithium ion batteries. Herein, ultrafast lithium storage in Sn-based nanocomposite anodes is demonstrated, which is boosted by pseudocapacitance benefitting from a high fraction of highly interconnected interfaces of Fe/Sn/Li2 O. By tailoring the voltage window in the range of 0...
February 23, 2017: Advanced Materials
Narges Armanfard, Majid Komeili, James P Reilly, Richard Mah, John F Connolly, Narges Armanfard, Majid Komeili, James P Reilly, Richard Mah, John F Connolly, John F Connolly, Majid Komeili, Narges Armanfard, James P Reilly, Richard Mah
Accurate and fast detection of event related potential (ERP) components is an unresolved issue in neuroscience and critical health care. Mismatch negativity (MMN) is a component of the ERP to an odd stimulus in a sequence of identical stimuli which has good correlation with coma awakening. All of the previous studies for MMN detection are based on visual inspection of the averaged ERPs (over a long recording time) by a skilled neurophysiologist. However, in practical situations, such an expert may not be available or familiar with all aspects of evoked potential methods...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Weihan Li, Shuhe Hu, Xiangyu Luo, Zhongling Li, Xizhen Sun, Minsi Li, Fanfan Liu, Yan Yu
Red phosphorus (P) has attracted intense attention as promising anode material for high-energy density sodium-ion batteries (NIBs), owing to its high sodium storage theoretical capacity (2595 mAh g(-1) ). Nevertheless, natural insulating property and large volume variation of red P during cycling result in extremely low electrochemical activity, leading to poor electrochemical performance. Herein, the authors demonstrate a rational strategy to improve sodium storage performance of red P by confining nanosized amorphous red P into zeolitic imidazolate framework-8 (ZIF-8) -derived nitrogen-doped microporous carbon matrix (denoted as P@N-MPC)...
February 22, 2017: Advanced Materials
Gerd Bobe, Tora J Cobb, Scott W Leonard, Savinda Aponso, Christopher B Bahro, Dipankar Koley, Eunice Mah, Richard S Bruno, Maret G Traber
Electric conductivity in plasma is the balance between oxidized and reduced molecules (static Oxidation-Reduction Potential, sORP) and the amount of readily oxidizable molecules (capacity ORP, cORP). Adults with metabolic syndrome (MetS) have increased inflammation, dyslipidemia and oxidative stress; therefore, participants with MetS were hypothesized to have higher plasma sORP and lower cORP than those measures in healthy adults. Heparin-anticoagulated plasma from healthy and age- and gender-matched individuals with MetS (BMI: 22...
February 14, 2017: Redox Biology
Shi Chen, Lai Chen, Yitong Li, Yuefeng Su, Yun Lu, Liying Bao, Jing Wang, Meng Wang, Feng Wu
Layered lithium-rich cathode material, Li1.2Ni0.2Mn0.6O2 was successfully synthesized by a sol-gel method followed by coating with different amount of Li3-BO3 (LBO, 1wt %, 3wt %, 5wt %). The effects of LBO coating layer on the structure, morphology and low-temperature (-30 °C) electrochemical properties of these materials are investigated systematically. The morphology, crystal structure and grain size of the Li-rich layered oxide are not essentially changed after surface modification; and according to the TEM results, the Li-B-O coating layer exists as an amorphous layer with a thickness of 5~8 nm when the amount is 3wt %...
February 21, 2017: ACS Applied Materials & Interfaces
Chaofan Yang, Xiaosong Zhang, Mengyi Huang, Junjie Huang, Zebo Fang
LiNi1/3Co1/3Mn1/3O2 (NCM) is regarded as a promising material for next-generation lithium ion batteries due to the high capacity, but its practical applications are limited by the poor electronic conductivity. Here, a one-step method is used to prepare carbon coated LiNi1/3Co1/3Mn1/3O2 (NCM/C) by applying active carbon as reaction matrix. TEM shows LiNi1/3Co1/3Mn1/3O2 particles are homogeneously coated by carbon with a thickness about 10 nm. NCM/C delivers the discharge capacity of 191.2 mAh g-1 at 0.5 C (85 mA g-1) with a columbic efficiency of 91...
February 21, 2017: ACS Applied Materials & Interfaces
Yangyang Huang, Xiang Li, Jiahuan Luo, Kun Wang, Qin Zhang, Yuegang Qiu, Shixiong Sun, Shantang Liu, Jiantao Han, Yunhui Huang
Sodium-ion batteries (SIBs) have shown extensive prospect as alternative rechargeable batteries in large-scale energy storage systems owing to the abundance and low-cost of sodium. Developing high-performance cathode and anode materials is a big challenge for SIBs. As we all know, TiNb2O7 (TNO) exhibits a high capacity of ~250 mAh g-1 with excellent capacity retention as a Li-insertion anode for lithium-ion batteries, but it has rarely been discussed as an anode for SIBs. Here, we demonstrate ball-milled TiNb2O7 (BM-TNO) as SIB anode, which provides an average voltage of ~0...
February 20, 2017: ACS Applied Materials & Interfaces
Shi Chen, Yu Zheng, Yun Lu, Yuefeng Su, Liying Bao, Ning Li, Yitong Li, Jing Wang, Renjie Chen, Feng Wu
Layered lithium-rich cathode materials have been considered as competitive candidates for advanced lithium-ion batteries, due to their merits in high capacity (more than 250 mAh·g-1), low cost and environmental benignity. However, they still surfer from poor rate capability and modest cycling performance. To address these issues, we have proposed and constructed a spinel-structure skin and ferric oxide islands on the surface of layered lithium-rich cathode materials through a facile wet chemical method. During the surface modification, Li ions in the surface area of pristine particles could be partially extracted by H+, along with the depositing process of ferric hydrogen...
February 20, 2017: ACS Applied Materials & Interfaces
Takatoshi Kasukabe, Hirotomo Nishihara, Katsuya Kimura, Taketoshi Matsumoto, Hikaru Kobayashi, Makoto Okai, Takashi Kyotani
Nowadays, ca. 176,640 tons/year of silicon (Si) (>4N) is manufactured for Si wafers used for semiconductor industry. The production of the highly pure Si wafers inevitably includes very high-temperature steps at 1400-2000 °C, which is energy-consuming and environmentally unfriendly. Inefficiently, ca. 45-55% of such costly Si is lost simply as sawdust in the cutting process. In this work, we develop a cost-effective way to recycle Si sawdust as a high-performance anode material for lithium-ion batteries...
February 20, 2017: Scientific Reports
Yunping Wen, Long Chen, Ying Pang, Zhaowei Guo, Duan Bin, Yong-Gang Wang, Congxiao Wang, Yongyao Xia
This paper reports a facile sol-gel synthesis method to successfully prepare the TiP2O7/expanded graphite (EG) nanocomposite as an advanced anode material for aqueous lithium-ion batteries. The constructed TiP2O7 nanocomposite (50-100 nm) are in-situ encapsulated in the pore and layer structure of expanded graphite with good conductivity and high specific surface area. As a consequence, the resulting TiP2O7/EG electrode exhibits a reversible capacity of 66 mAh g-1 at 0.1 A g-1 with an appropriate potential of -0...
February 17, 2017: ACS Applied Materials & Interfaces
Min Liu, Hongyun Jin, Evan Uchaker, Zhiqiang Xie, Ying Wang, Guozhong Cao, Shuen Hou, Jiangyu Li
Fe3O4 has been regarded as a promising anode material for lithium-ion batteries (LIBs) due to its high theoretical capacity, low cost, and environmental friendliness. In this work, we present a one-pot reducing-composite-hydroxide-mediated (R-CHM) method to synthesize in-situ carbon-coated Fe3O4 (Fe3O4@C) at 280 oC, using Fe(NO3)3·9H2O and PEG800 as raw materials and NaOH/KOH as the medium. The as-prepared Fe3O4 octahedron has an average size of 100 nm in diameter, covered by carbon layer with the thickness of 3 nm , as revealed by FESEM and HRTEM images...
February 17, 2017: Nanotechnology
Lianfeng Duan, Xueyu Zhang, Kaiqiang Yue, Yue Wu, Jian Zhuang, Wei Lü
The LiMn2O4 hollow nanofibers with a porous structure have been synthesized by modified electrospinning techniques and subsequent thermal treatment. The precursors were electrospun directly onto the fluorine-doped tin oxide (FTO) glass. The heating rate and FTO as substrate play key roles on preparing porous hollow nanofiber. As cathode materials for lithium-ion batteries (LIBs), LiMn2O4 hollow nanofibers showed the high specific capacity of 125.9 mAh/g at 0.1 C and a stable cycling performance, 105.2 mAh/g after 400 cycles...
December 2017: Nanoscale Research Letters
Bianca Paulitsch, Jeongsik Yun, Aliaksandr S Bandarenka
The so-called Prussian Blue Analogues (PBAs) are spotlighted as promising cathode materials for aqueous Na-ion batteries regarding their good performance for the application in future large scale energy storage systems. In this work, we demonstrate that one of the PBA representatives, namely Na2VOx[Fe(CN)6] thin films (VHCFs), is a promising cathode material for aqueous Na-ion batteries with very positive intercalation/de-intercalation potentials, which might likely designate a new benchmark in the field. In order to maximize the material utilization, we have formed VHCF thin films on model current collectors from aqueous solutions...
February 16, 2017: ACS Applied Materials & Interfaces
Guanghai Chen, Ying Bai, Hui Li, Yu Li, Zhaohua Wang, Qiao Ni, Lu Liu, Feng Wu, Yugui Yao, Chuan Wu
Pursuing for novel electrode materials is significant for the progress of sodium ion batteries (SIBs). Here, a multilayered electride prepared by simple thermal decomposition of solid Ca3N2, namely Ca2N, is introduced as a new anode material of SIBs for the first time, and a compression molding electrode fabricated by pressing Ca2N powder into nickel foam is applied to protect Ca2N from trace moisture and oxygen. The as-prepared electrode delivers an initial discharge capacity of 1110.5 mAh g(-1) and a reversible discharge capacity of ∼320 mAh g(-1)...
February 20, 2017: ACS Applied Materials & Interfaces
Fenghua Zheng, Qichang Pan, Chenghao Yang, Xunhui Xiong, Xing Ou, Renzong Hu, Yu Chen, Meilin Liu
Sodium ion batteries (SIBs) have been regarded as a prime candidate for large-scale energy storage, and developing high performance anode material is one of the main challenges for advanced SIBs. Here, novel structured Sn-MoS2-C@C microspheres, in which Sn nanoparticles are evenly embedded in MoS2 nanosheets and a thin carbon film is homogenously engineered over the microspheres, have been fabricated by the hydrothermal method. The Sn-MoS2-C@C microspheres demonstrate an excellent Na-storage performance as an anode of SIBs, deliver a high reversible charge capacity (580...
February 15, 2017: Chemistry: a European Journal
Seon Hye Yoon, Yong Joon Park
We report an air electrode employing polyimide-coated carbon nanotubes (CNTs) combined with a redox mediator for Li-O2 cells with enhanced electrochemical performance. The polyimide coating on the carbon surface suppresses unwanted side reactions, which decreases the amount of accumulated reaction products on the surface of the air electrode during cycling. The redox mediators lower the overpotential of the Li-O2 cells because they can easily transfer electrons from the electrode to the reaction products. The low overpotential can also decrease the side reactions that activate at a high potential range...
February 15, 2017: Scientific Reports
Shuai Wang, Shuqiang Jiao, Donghua Tian, Hao-Sen Chen, Handong Jiao, Jiguo Tu, Yingjun Liu, Dai-Ning Fang
An ultrafast rechargeable multi-ions battery is presented, in which multi-ions can electrochemically intercalate into graphite layers, exhibiting a high reversible discharge capacity of ≈100 mAh g(-1) and a coulombic efficiency of ≈99% over hundreds of cycles at a high current density. The results may open up a new paradigm for multi-ions-based electrochemical battery technologies and applications.
February 15, 2017: Advanced Materials
Qiuyang Ma, Wanwan Wang, Peiyuan Zeng, Zhen Fang
A Ge/C spongelike composite is prepared by the facile and scalable single-step pyrolysis of the GeOx/ethylenediamine gel process, which has a feature with three-dimensional interconnected pore structures and is hybridized with nitrogen-doped carbon. A detailed investigation shows that the pore in the sponge is formed for the departure of the gaseous products at the evaluated temperature. As an anode for lithium ion batteries, the obtained composite exhibits superior specific capacity in excess of 1016 mA h g(-1) at 100 mA g(-1) after 100 cycles...
February 21, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
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