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lithium dendrites

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https://read.qxmd.com/read/30899782/composite-lithium-electrode-with-mesoscale-skeleton-via-simple-mechanical-deformation
#1
Zheng Liang, Kai Yan, Guangmin Zhou, Allen Pei, Jie Zhao, Yongming Sun, Jin Xie, Yanbin Li, Feifei Shi, Yayuan Liu, Dingchang Lin, Kai Liu, Hansen Wang, Hongxia Wang, Yingying Lu, Yi Cui
Lithium metal-based batteries are attractive energy storage devices because of high energy density. However, uncontrolled dendrite growth and virtually infinite volume change, which cause performance fading and safety concerns, have limited their applications. Here, we demonstrate that a composite lithium metal electrode with an ion-conducting mesoscale skeleton can improve electrochemical performance by locally reducing the current density. In addition, the potential for short-circuiting is largely alleviated due to side deposition of mossy lithium on the three-dimensional electroactive surface of the composite electrode...
March 2019: Science Advances
https://read.qxmd.com/read/30860309/fluorescence-probing-of-active-lithium-distribution-for-lithium-metal-anode
#2
Xiangyang Cheng, Fang Xian, Zhenglin Hu, Chen Wang, Xiaofan Du, Huanrui Zhang, Shougang Chen, Shanmu Dong, Guanglei Cui
Uncontrollable growth of Li dendrites and accumulation of "dead Li" are two severe concerns for lithium (Li) metal battery, which leads to safety hazards and low Coulombic efficiency, respectively. To investigate the deterioration behavior of cell, it is of great importance to illustrate the distribution of active Li species on anode surface and distinguish the Li dendrites from the dead Li species. However, up to date, it is still challenging to identify these issues by conventional visual observation methods...
March 12, 2019: Angewandte Chemie
https://read.qxmd.com/read/30821299/an-ethyl-methyl-sulfone-co-solvent-eliminates-macroscopic-morphological-instabilities-of-lithium-metal-anode
#3
Woochul Shin, Kang Pyo So, William F Stickle, Cong Su, Jun Lu, Ju Li, Xiulei Ji
Lithium metal anodes suffer from a short cycle life, and the parasitic reactions of lithium with electrolytes are widely observed. Common sense is to avoid such reactions. Herein, we head in the opposite direction by using an oxidizing co-solvent, ethyl methyl sulfone, in the electrolyte, which addresses the 'dendrite' issue entirely, resulting in a dense and macroscopically smooth surface morphology of the plated lithium. However, a dendrite-free lithium metal anode does not necessarily exhibit a high coulombic efficiency...
March 1, 2019: Chemical Communications: Chem Comm
https://read.qxmd.com/read/30807097/a-single-additive-with-dual-functional-ions-for-stabilizing-lithium-anode
#4
Yan Ouyang, Yanpeng Guo, Dian Li, Yaqing Wei, Tianyou Zhai, Huiqiao Li
The dendritic lithium formation and sustained lithium consumption caused by the uncontrollable side reactions between lithium and electrolyte seriously restrict the applications of lithium anode in high-energy density batteries, especially in carbonate electrolyte. Ameliorating the surface status of lithium anode is critical for modulating lithium deposition behaviour and improving the cycling stability of lithium metal batteries. Herein, magnesium chloride salt is firstly reported as a carbonate electrolyte additive for lithium surface modification by in-situ reaction...
February 26, 2019: ACS Applied Materials & Interfaces
https://read.qxmd.com/read/30801169/dual-lithiophilic-structure-for-uniform-li-deposition
#5
Shouyi Yuan, Junwei Lucas Bao, Chao Li, Yong-Yao Xia, Donald G Truhlar, Yong-Gang Wang
The development of Li metal anode is hindered by the Li dendrites arising from the random deposition of Li nucleus during cycles. Hence, uniform deposition of Li during repeated cycles is crucial for the development of Li metal batteries. However, it is difficult to regulate Li deposition due to convection in the electrolyte. Here, we employ a dual lithiophilic structure composed of polar metal organic framework (MOF) and highly conductive Ag nanoparticles, and we show that it brings about uniform lithium deposition...
February 25, 2019: ACS Applied Materials & Interfaces
https://read.qxmd.com/read/30796214/lithium-anode-stable-in-air-for-low-cost-fabrication-of-a-dendrite-free-lithium-battery
#6
Xiaowei Shen, Yutao Li, Tao Qian, Jie Liu, Jinqiu Zhou, Chenglin Yan, John B Goodenough
Lithium metal, the ideal anode material for rechargeable batteries, suffers from the inherent limitations of sensitivity to the humid atmosphere and dendrite growth. Herein, low-cost fabrication of a metallic-lithium anode that is stable in air and plated dendrite-free from an organic-liquid electrolyte solves four key problems that have plagued the development of large-scale Li-ion batteries for storage of electric power. Replacing the low-capacity carbon anode with a safe, dendrite-free lithium anode provides a fast charge while reducing the cost of fabrication of a lithium battery, and increasing the cycle life of a rechargeable cell by eliminating the liquid-electrolyte ethylene-carbonate additive used to form a solid-electrolyte interphase passivation layer on the anode that is unstable during cycling...
February 22, 2019: Nature Communications
https://read.qxmd.com/read/30794076/glycyrrhizic-acid-renders-robust-neuroprotection-in-rodent-model-of-vascular-dementia-by-controlling-oxidative-stress-and-curtailing-cytochrome-c-release
#7
Yogeshkanna Sathyamoorthy, Kathiravan Kaliappan, Pradeepkumar Nambi, Rameshkumar Radhakrishnan
BACKGROUND: Chronic cerebral hypoperfusion (CCH), a concern for neurocognitive health, is linked to various vascular ailments and other comorbidities. This study primarily aims to explain the mitigating effects of glycyrrhizic acid (GA) on cognitive health challenged by chronic cerebral hypoperfusion. METHODS: Adult male Sprague Dawley rats were allocated into four groups: (i) Sham, (ii) Lesion (2VO), (iii) GA treated (20 mg/kg), and (iv) lithium chloride (Li) treated (40 mg/kg)...
February 22, 2019: Nutritional Neuroscience
https://read.qxmd.com/read/30793031/lithiophilicity-chemistry-of-heteroatom-doped-carbon-to-guide-uniform-lithium-nucleation-in-lithium-metal-anodes
#8
Xiang Chen, Xiao-Ru Chen, Ting-Zheng Hou, Bo-Quan Li, Xin-Bing Cheng, Rui Zhang, Qiang Zhang
The uncontrollable growth of lithium (Li) dendrites seriously impedes practical applications of Li metal batteries. Various lithiophilic conductive frameworks, especially carbon hosts, are used to guide uniform Li nucleation and thus deliver a dendrite-free composite anode. However, the lithiophilic nature of these carbon hosts is poorly understood. Herein, the lithiophilicity chemistry of heteroatom-doped carbon is investigated through both first principles calculations and experimental verifications to guide uniform Li nucleation...
February 2019: Science Advances
https://read.qxmd.com/read/30785259/surface-restraint-synthesis-of-an-organic-inorganic-hybrid-layer-for-dendrite-free-lithium-metal-anode
#9
Jijin Yang, Cejun Hu, Yin Jia, Yingchun Pang, Li Wang, Wen Liu, Xiaoming Sun
Li metal is considered to be the most attractive anode for next-generation batteries because of its high specific capacity and low reduction potential. However, uncontrolled Li dendrite growth and low coulombic efficiency cause severe capacity decay and safety issues. Here we propose a LiCl contained inorganic-organic hybrid layer on Li metal surface by a surface restraint dehalogenation reaction, which is highly uniform and features lithiophilic property as well as high ionic conductivity that can inhibit Li dendrite growth effectively...
February 20, 2019: ACS Applied Materials & Interfaces
https://read.qxmd.com/read/30761738/niobium-based-oxides-toward-advanced-electrochemical-energy-storage-recent-advances-and-challenges
#10
REVIEW
Qinglin Deng, Yanpeng Fu, Changbao Zhu, Yan Yu
Niobium-based oxides including Nb2 O5 , TiNbx O2+2.5x compounds, M-Nb-O (M = Cr, Ga, Fe, Zr, Mg, etc.) family, etc., as the unique structural merit (e.g., quasi-2D network for Li-ion incorporation, open and stable Wadsley- Roth shear crystal structure), are of great interest for applications in energy storage systems such as Li/Na-ion batteries and hybrid supercapacitors. Most of these Nb-based oxides show high operating voltage (>1.0 V vs Li+ /Li) that can suppress the formation of solid electrolyte interface film and lithium dendrites, ensuring the safety of working batteries...
February 14, 2019: Small
https://read.qxmd.com/read/30761614/3d-printed-high-performance-lithium-metal-microbatteries-enabled-by-nanocellulose
#11
Daxian Cao, Yingjie Xing, Karnpiwat Tantratian, Xiao Wang, Yi Ma, Alolika Mukhopadhyay, Zheng Cheng, Qing Zhang, Yucong Jiao, Lei Chen, Hongli Zhu
Batteries constructed via 3D printing techniques have inherent advantages including opportunities for miniaturization, autonomous shaping, and controllable structural prototyping. However, 3D-printed lithium metal batteries (LMBs) have not yet been reported due to the difficulties of printing lithium (Li) metal. Here, for the first time, high-performance LMBs are fabricated through a 3D printing technique using cellulose nanofiber (CNF), which is one of the most earth-abundant biopolymers. The unique shear thinning properties of CNF gel enables the printing of a LiFePO4 electrode and stable scaffold for Li...
February 13, 2019: Advanced Materials
https://read.qxmd.com/read/30741522/temperature-dependent-li-storage-performance-in-nanoporous-cu-ge-al-alloy
#12
Wenqing Ma, Yahui Wang, Yijun Yang, Xi Wang, Zhihao Yuan, Xizheng Liu, Yi Ding
Lithium ion batteries (LIBs) process performance fading and safety concerns at low temperature (LT) prohibit their application in cold climates. The alloy-type electrodes demonstrate great potentials in stable and dendrite-free anodes at LT. Herein, we report a temperature-dependent Li-storage performance in Al-based nanoporous alloy anode. The nanoporous-structured Cu-Ge-Al ternary alloys (NP-CuGeAl) have been designed and prepared by selectively etching Al out. The high Al-content NP-CuGeAl (acid etching for 6 h, named as CGA-6) is composed of multi-intermetallic compounds (denoted as MxNy, M, N = Cu, Al, Ge) with bimodal porous architectures...
February 11, 2019: ACS Applied Materials & Interfaces
https://read.qxmd.com/read/30715775/biomimetic-designed-stable-lithium-metal-anodes-by-co-depositing-li-with-2d-materials-shuttle
#13
Qingtao Ma, Xiaowen Sun, Ping Liu, Yongyao Xia, Xingjiang Liu, Jiayan Luo
Lithium metal batteries are promising candidates for next-generation battery technology due to their high energy density. However, research progress in lithium metal batteries is severely hindered by the lithium dendrite growth. Lithium is soft with mechanical modulus as low as polymers. This inspires us to suppress lithium dendrites using nacre structure, which is soft-hard organic-inorganic lamella. Here, we view lithium as the soft organic segment and choose colloidal vermiculite sheets as the hard inorganic constituent, which theoretically have 30 times higher modulus...
February 4, 2019: Angewandte Chemie
https://read.qxmd.com/read/30709312/first-principles-studies-of-self-diffusion-processes-on-metallic-lithium-surfaces
#14
Daniel Gaissmaier, Donato Fantauzzi, Timo Jacob
Due to the theoretical high specific capacity (3860 mAh/g) and the low standard electrode potential (-3.040 V vs. standard hydrogen electrode), rechargeable lithium metal batteries are considered as excellent energy storage systems. Unfortunately, security concerns related to dendrite formation during charge/discharge cycles still hinder the commercial use of Li metal-based batteries. Using density functional theory, we have studied the bulk and surface properties of metallic lithium at an atomistic level. In this process, bcc Li(100) proved to be the most stable metallic lithium surface...
January 28, 2019: Journal of Chemical Physics
https://read.qxmd.com/read/30707016/lithiophilic-ag-nanoparticle-layer-on-cu-current-collector-towards-stable-li-metal-anode
#15
Zhen Hou, Yikang Yu, Wenhui Wang, Xixia Zhao, Qian Di, Qianwen Chen, Wen Chen, Yulian Liu, Zewei Quan
The intractable hurdles of low Coulombic efficiency and dendritic Li formation during repeated deposition/stripping process hinder commercial use of Li metal anode for next-generation battery systems. Achieving uniform Li nucleation is one of the effective strategies to address these issues, and it is of practical importance to realize it on commercial Cu current collector that is lithiophobic. Herein, we design a nanostructured Ag lithiophilic layer on Cu foil via an electroless plating process for Li metal current collector...
February 1, 2019: ACS Applied Materials & Interfaces
https://read.qxmd.com/read/30702774/extended-electrochemical-window-of-solid-electrolytes-via-heterogeneous-multilayered-structure-for-high-voltage-lithium-metal-batteries
#16
Hui Duan, Min Fan, Wan-Ping Chen, Jin-Yi Li, Peng-Fei Wang, Wen-Peng Wang, Ji-Lei Shi, Ya-Xia Yin, Li-Jun Wan, Yu-Guo Guo
In response to the call for safer high-energy-density storage systems, high-voltage solid-state Li metal batteries have attracted extensive attention. Therefore, solid electrolytes are required to be stable against both Li anode and high-voltage cathodes; nevertheless, the requirements still cannot be completely satisfied. Herein, a heterogeneous multilayered solid electrolyte (HMSE) is proposed to broaden electrochemical window of solid electrolytes to 0-5 V, through different electrode/electrolyte interfaces to overcome the interfacial instability problems...
January 31, 2019: Advanced Materials
https://read.qxmd.com/read/30680811/self-suppression-of-lithium-dendrite-in-all-solid-state-lithium-metal-batteries-with-poly-vinylidene-difluoride-based-solid-electrolytes
#17
Xue Zhang, Shuo Wang, Chuanjiao Xue, Chengzhou Xin, Yuanhua Lin, Yang Shen, Liangliang Li, Ce-Wen Nan
Polymer-based electrolytes have attracted ever-increasing attention for all-solid-state lithium (Li) metal batteries due to their ionic conductivity, flexibility, and easy assembling into batteries, and are expected to overcome safety issues by replacing flammable liquid electrolytes. However, it is still a critical challenge to effectively block Li dendrite growth and improve the long-term cycling stability of all-solid-state batteries with polymer electrolytes. Here, the interface between novel poly(vinylidene difluoride) (PVDF)-based solid electrolytes and the Li anode is explored via systematical experiments in combination with first-principles calculations, and it is found that an in situ formed nanoscale interface layer with a stable and uniform mosaic structure can suppress Li dendrite growth...
January 25, 2019: Advanced Materials
https://read.qxmd.com/read/30676759/wrinkled-graphene-cages-as-hosts-for-high-capacity-li-metal-anodes-shown-by-cryogenic-electron-microscopy
#18
Hansen Wang, Yuzhang Li, Yanbin Li, Yayuan Liu, Dingchang Lin, Cheng Zhu, Guangxu Chen, Ankun Yang, Kai Yan, Hao Chen, Yangying Zhu, Jun Li, Jin Xie, Jinwei Xu, Zewen Zhang, Rafael Vilá, Allen Pei, Kecheng Wang, Yi Cui
Lithium (Li) metal has long been considered the "holy grail" of battery anode chemistry, but is plagued by its low efficiency and poor safety due to its high chemical reactivity and large volume fluctuation, respectively. Here we introduce a new host of wrinkled graphene cage (WGC) for Li metal. Different from recently reported amorphous carbon spheres, WGC shows highly improved mechanical stability, better Li ion conductivity and excellent solid electrolyte interphase (SEI) for continuous robust Li metal protection...
January 24, 2019: Nano Letters
https://read.qxmd.com/read/30673293/nanoporous-polymer-films-with-high-cation-transference-number-stabilize-lithium-metal-anodes-in-light-weight-batteries-for-electrified-transportation
#19
Lin Ma, Chengyin Fu, Longjun Li, Karthik S Mayilvahanan, Tylan Watkins, Brian R Perdue, Kevin R Zavadil, Brett A Helms
To suppress dendrite formation in lithium metal batteries, high cation transference number electrolytes that reduce electrode polarization are highly desirable, but rarely available using conventional liquid electrolytes. Here, we show that liquid electrolytes increase their cation transference numbers (e.g., ~0.2 to >0.70) when confined to a structurally-rigid polymer host whose pores are on a similar length scale (0.5-2 nm) as the Debye screening length in the electrolyte, which results in a diffuse electrolyte double layer at the polymer-electrolyte interface that retains counter-ions and reject co-ions from the electrolyte due to their larger size...
January 23, 2019: Nano Letters
https://read.qxmd.com/read/30672549/multilayer-graphene-stabilized-lithium-deposition-for-anode-free-lithium-metal-batteries
#20
Addisu Alemayehu Assegie, Cheng-Chu Chung, Meng-Che Tsai, Wei-Nien Su, Chun-Wei Chen, Bing-Joe Hwang
The will to circumvent capacity fading, Li dendrite formation, and low coulombic efficiency in anode-free Li-metal batteries (AFLMBs) requires a radical change in the science underpinning new materials discovery, battery design, and understanding electrode interfaces. Herein, a Cu current collector formed with ultrathin multilayer graphene grown via chemical vapor deposition (CVD) was used as an artificial layer to stabilize the electrode interface and sandwich-deposited Li with Cu. A multilayer graphene film's superior strength, chemical stability, and flexibility make it an excellent choice to modify a Cu electrode...
January 23, 2019: Nanoscale
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