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lithium carbonate

Jinhui Zhu, Jun Yang, Zhixin Xu, Jiulin Wang, Yanna Nuli, Xiaodong Zhuang, Xinliang Feng
Silicon (Si) anodes, which are among the most promising candidates for high-energy lithium-ion batteries (LIBs), have attracted considerable attention from both academic and industrial communities. However, Si anodes usually suffer from an inherently low conductivity and extremely large volume change during the lithiation and delithiation processes, and consequently exhibit an inferior rate capability and poor cycle life. In this paper, we report new porous polymer-derived carbon coated Si nanoparticles (NPs) as the next generation anodes for LIBs to overcome these serious problems...
June 20, 2017: Nanoscale
Ying Wang, Jiahui Guo, Li Li, Yali Ge, Baojun Li, Yingjiu Zhang, Yuanyuan Shang, Anyuan Cao
Single-walled carbon nanotube (SWNT) films are a potential candidate as porous conductive electrodes for energy conversion and storage; tailoring the loading and distribution of active materials grafted on SWNTs is critical for achieving maximum performance. Here, we show that as-synthesized SWNT samples containing residual Fe catalyst can be directly converted to Fe2O3/SWNT composite films by thermal annealing in air. The mass loading of Fe2O3 nanoparticles is tunable from 63 wt.% up to 96 wt.%, depending on the annealing temperature (from 450 C to 600 C), while maintaining the porous network structure...
June 20, 2017: Nanotechnology
Mohammad Rejaul Kaiser, Shulei Chou, Hua-Kun Liu, Shi-Xue Dou, Chunsheng Wang, Jiazhao Wang
Electrolytes, which are a key component in electrochemical devices, transport ions between the sulfur/carbon composite cathode and the lithium anode in lithium-sulfur batteries (LSBs). The performance of a LSB mostly depends on the electrolyte due to the dissolution of polysulfides into the electrolyte, along with the formation of a solid-electrolyte interphase. The selection of the electrolyte and its functionality during charging and discharging is intricate and involves multiple reactions and processes. The selection of the proper electrolyte, including solvents and salts, for LSBs strongly depends on its physical and chemical properties, which is heavily controlled by its molecular structure...
June 16, 2017: Advanced Materials
Ahsan Habib, Darrell Sawmiller, Song Li, Yang Xiang, David Rongo, Jun Tian, Huayan Hou, Jin Zeng, Adam Smith, Shengnuo Fan, Brian Giunta, Takashi Mori, Glenn Currier, Douglas Ronald Shytle, Jun Tan
Lithium has been marketed in the United States of America since the 1970s as a treatment for bipolar disorder. More recently, studies have shown that lithium can improve cognitive decline associated with Alzheimer's disease (AD). However, the current United States Food and Drug Administration-approved lithium pharmaceutics (carbonate and citrate chemical forms) have a narrow therapeutic window and unstable pharmacokinetics that, without careful monitoring, can cause serious adverse effects. Here, we investigated the safety profile, pharmacokinetics, and therapeutic efficacy of LISPRO (ionic co-crystal of lithium salicylate and l-proline), lithium salicylate, and lithium carbonate (Li2CO3)...
June 15, 2017: Cell Death & Disease
Biyi Xu, Huanan Duan, Hezhou Liu, Chang An Wang, Shengwen Zhong
To improve the solid-electrolyte/electrode interface compatibility, we have proposed the concept of hybrid electrolyte by including a small amount of liquid electrolyte in between. In this work, n-BuLi, a superbase, has been found to significantly improve the cycling performance of LiFePO4/Li hybrid cells containing Li7La3Zr1.5Ta0.5O12 (LLZT) and conventional carbonate-based liquid electrolyte. The modified cells have been cycled for 400 cycles at 100 and 200 μA cm(-2) at room temperature, indicating excellent solid/liquid electrolyte interface stability...
June 19, 2017: ACS Applied Materials & Interfaces
Michael G Fischer, Xiao Hua, Bodo D Wilts, Ilja Gunkel, Thomas Bennett, Ullrich Steiner
Mesoporous titania microspheres (MTM) have been employed in many applications including (photo-)catalysis as well as energy conversion and storage. Their morphology offers a hierarchical structural design motif that lends itself to being incorporated into established large-scale fabrication processes. Despite the fact that device performance hinges on the precise morphological characteristics of these materials, control over the detailed mesopore structure and the tunability of the pore size remains a challenge...
June 13, 2017: ACS Applied Materials & Interfaces
Chengling Zhu, Zhixin Chen, Shenmin Zhu, Yao Li, Hui Pan, Xin Meng, Muhammad Imtiaz, Di Zhang
Inspired by nature, herein we designed a novel construction of SnO2 anodes with an extremely high lithium storage performance. By utilizing small sheets of graphene oxide, the partitioned-pomegranate-like structure was constructed (SnO2@C@half-rGO), in which the porous clusters of SnO2 nanoparticles are partially supported by reduced graphene oxide sheets while the rest part is exposed (half-supported), like partitioned pomegranates. When served as anode for lithium-ion batteries, SnO2@C@half-rGO exhibited considerably high specific capacity (1034...
June 12, 2017: Scientific Reports
Sebastian Molitor, Viktoria H Gessner
The synthesis and structures of a series of M/X carbenoids of the type [Ph2P(S)]2CMX with M = Li, Na and K and X = Cl and Br are reported, amongst the first isolated Na/Br and K/Br carbenoids. NMR spectroscopic as well as crystallo¬graphic studies showed distinct differences between the lithium carbenoids and their heavier congeners. In the solid-state, all carbenoids showed no direct metal carbon interaction, but an interaction between the metal and the halogen atom. This contact is only very weak in case of the Li/Br carbenoid, but much more pronounced in the corresponding potassium and sodium compounds...
June 9, 2017: Chemistry: a European Journal
Zhiwei Tang, Shaohong Liu, Zhitao Lu, Xidong Lin, Bingna Zheng, Ruliang Liu, Dingcai Wu, Ruowen Fu
A class of novel N-doped porous carbon nanospheres (PCNSs) with ultrahigh surface areas (e.g., Langmuir surface area = 3219 m(2) g(-1)) and large templated mesopore diameters (up to 18.6 nm) was synthesized based upon a simple yet efficient copolymerization-induced self-assembly process of aniline/pyrrole co-monomers and block copolymer templates. The PCNSs exhibited enhanced adsorption properties towards creatinine and superior lithium-sulfur battery performances.
June 9, 2017: Chemical Communications: Chem Comm
Kang-Seop Yun, Sung Jin Pai, Byung Chul Yeo, Kwang-Ryeol Lee, Sun-Jae Kim, Sang Soo Han
We propose the ReaxFF reactive force field as a simulation protocol for predicting the evolution of solid-electrolyte interphase (SEI) components such as gases (C2H4, CO, CO2, CH4, and C2H6), and inorganic (Li2CO3, Li2O, and LiF) and organic (ROLi and ROCO2Li: R = -CH3 or -C2H5) products that are generated by the chemical reactions between the anodes and liquid electrolytes. ReaxFF was developed from ab initio results, and a molecular dynamics simulation with ReaxFF realized the prediction of SEI formation under real experimental conditions and with a reasonable computational cost...
June 9, 2017: Journal of Physical Chemistry Letters
Shichao Wu, Yu Qiao, Sixie Yang, Masayoshi Ishida, Ping He, Haoshen Zhou
Reducing the high charge potential is a crucial concern in advancing the performance of lithium-oxygen batteries. Here, for water-containing lithium-oxygen batteries with lithium hydroxide products, we find that a hydrogen peroxide aqueous solution added in the electrolyte can effectively promote the decomposition of lithium hydroxide compounds at the ultralow charge potential on a catalyst-free Ketjen Black-based cathode. Furthermore, for non-aqueous lithium-oxygen batteries with lithium peroxide products, we introduce a urea hydrogen peroxide, chelating hydrogen peroxide without any water in the organic, as an electrolyte additive in lithium-oxygen batteries with a lithium metal anode and succeed in the realization of the low charge potential of ∼3...
June 6, 2017: Nature Communications
Xuqing Zhang, Dong Xie, Yu Zhong, Donghuang Wang, Jianbo Wu, Xiuli Wang, Xinhui Xia, Changdong Gu, Jiangping Tu
It is a consensus that improving the conductivity of sulfur cathodes and impeding the dissolution of lithium polysulfides are two key accesses to high-performance lithium-sulfur batteries (LSBs). Herein we report a sulfur/carbon black (S/C) cathode modified by self-polymerized polymer polydopamine (pDA) with the assistance of polymerization treatment. Here pDA acts as a novel and effective shell on the S/C cathode to stop the shuttle effect of polysulfides. By the synergistic effect of enhanced conductivity and multiple blocking effect for polysulfides, the S/C@pDA electrode exhibits improved electrochemical performances including large specific capacity (1135 mAh g1 at 0...
June 4, 2017: Chemistry: a European Journal
Wenhao Guan, Bin Pan, Peng Zhou, Jin-Xiao Mi, Dan Zhang, Jiacheng Xu, Yinzhu Jiang
Rechargeable sodium-ion batteries (SIBs) are receiving intense interest because the resource abundance of sodium and its lithium-like chemistry make them low cost alternatives to the prevailing lithium-ion batteries in large-scale energy storage devices. Two typical classes of materials including transition metal oxides and polyanion compounds have been under intensive investigation as cathodes for SIBs, however they are still limited to poor stability or low capacity of the state-of-art. Herein, we report a low cost carbon-coated Na2FeSiO4 with simultaneous high capacity and good stability, owing to the highly pure Na-rich cubic phase and the carbon-incorporated three-dimensional network morphology...
June 2, 2017: ACS Applied Materials & Interfaces
Zhiliang Liu, Xinghua Chang, Teng Wang, Wei Li, Haidong Ju, Xinyao Zheng, Xiuqi Wu, Cong Wang, Jie Zheng, Xingguo Li
Silica can be converted to silicon by magnesium reduction. Here, this classical reaction is renovated for more efficient preparation of silicon nanoparticles (nano-Si). By reducing the particle size of the starting materials, the reaction can be completed within 10 min by mechanical milling at ambient temperature. The obtained nano-Si with high surface reactivity are directly reacted with 1-pentanol to form an alkoxyl-functionalized hydrophobic colloid, which significantly simplifies the separation process and minimizes the loss of small Si particles...
June 7, 2017: ACS Nano
Kaidi Li, Bo Lin, Qiufeng Li, Huifeng Wang, Sen Zhang, Chao Deng
Rechargeable lithium-iodine batteries with abundant raw materials and low cost are promising electrochemical energy storage systems. Herein, we demonstrate that anchoring iodine to N-doped hollow carbon fold-hemisphere (N-FHS) is highly efficient to overcome slow kinetics and low stability of iodine cathode in lithium-iodine batteries. For the first time, significant effects of carbon framework architecture on the lithium storage performance of iodine cathode are studied in detail. Notably, the fold-hemisphere (N-FHS) is more effective than the similar architectures, such as hollow sphere (N-S) or hemisphere (N-HS), in modifying slow ion transport capability and fast structure deterioration...
June 21, 2017: ACS Applied Materials & Interfaces
Wenji Zheng, Zhijun Yan, Yan Dai, Naixu Du, Xiaobin Jiang, Hailing Dai, Xiangcun Li, Gaohong He
Interpenetrated networks between graphitic carbon infilling and ultrafine TiO2 nanocrystals with patterned macropores (100-200 nm) were successfully synthesized. Polypyrrole layer was conformably coated on the primary TiO2 nanoparticles (∼8 nm) by a photosensitive reaction and was then transformed into carbon infilling in the interparticle mesopores of the TiO2 nanoparticles. Compared to the carbon/graphene supported TiO2 nanoparticles or carbon coated TiO2 nanostructures, the carbon infilling would provide a conductive medium and buffer layer for volume expansion of the encapsulated TiO2 nanoparticles, thus enhancing conductivity and cycle stability of the C-TiO2 anode materials for lithium ion batteries (LIBs)...
June 21, 2017: ACS Applied Materials & Interfaces
Hang Ping, Hao Xie, Mingyu Xiang, Bao-Lian Su, Yucheng Wang, Jinyong Zhang, Fan Zhang, Zhengyi Fu
Biomineral formation processes in nature are temporally and spatially regulated under the functions of biomolecules in a confined space. It is potentially very productive to rationally design a mineralized system by taking into account confined space as well as biomolecules. The laboratory technique of "bacterial cell surface display" is an ideal platform to host catalytically active proteins in a three-dimensionally confined space. In the present study, aiming to regulate the synthesis of nanostructured TiO2 anatase, repeating segments of silaffin were displayed on Escherichia coli surfaces through genetic manipulation...
October 1, 2016: Chemical Science
Liping Zhang, Ju Fu, Chuhong Zhang
LiNi0.8Co0.15Al0.05O2/carbon nanotube (NCA/CNT) composite cathode materials are prepared by a facile mechanical grinding method, without damage to the crystal structure and morphology of the bulk. The NCA/CNT composite exhibits enhanced cycling and rate performance compared with pristine NCA. After 60 cycles at a current rate of 0.25 C, the reversible capacity of NCA/CNT composite cathode is 181 mAh/g with a discharge retention rate of 96%, considerably higher than the value of pristine NCA (153 mAh/g with a retention rate of 90%)...
December 2017: Nanoscale Research Letters
Chunyan Ding, Weiwei Zhou, Bin Wang, Xin Li, Dong Wang, Yong Zhang, Guangwu Wen
Integration of carbon materials with benign iron oxides blazes a way in constructing high-performance anodes for lithium-ion batteries (LIBs). In this paper, a unique general, simple, and controllable strategy is developed toward in-situ uniform coating of iron oxide nanostructures with graphitized carbon (GrC) layers. Basic synthetic procedure only involves a simple dip-coating process for the loading of Ni-containing seeds and a subsequent Ni-catalyzed chemical vapor deposition (CVD) process for the growth of GrC layers...
May 31, 2017: Nanotechnology
Haipeng Guo, Boyang Ruan, Lili Liu, Lei Zhang, Zhanliang Tao, Shulei Chou, Jiazhao Wang, Huakun Liu
Germanium (Ge) is a prospective anode material for lithium-ion batteries, as it possesses large theoretical capacity, outstanding lithium-ion diffusivity, and excellent electrical conductivity. Ge suffers from drastic capacity decay and poor rate performance, however, owing to its low electrical conductivity and huge volume expansion during cycling processes. Herein, a novel strategy has been developed to synthesize a Ge@N-doped carbon nanotubes (Ge@N-CNTs) composite with Ge nanoparticles uniformly distributed in the N-CNTs by using capillary action...
May 30, 2017: Small
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