SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
·
IF 5.107
Hui Dang,Na Li,Zhidong Chang,Benfeng Wang,Yifei Zhan,Xue Wu,Wenbo Liu,Shujaat Ali,Hongda Li,Jiahui Guo,Wenjun Li,Hualei Zhou,Changyan Sun
In the present case, insoluble lithium in the simulated slag which is obtained by pyrometallurgical processing of spent lithium ion batteries (LiBs) is leached aqueously through transformation of insoluble lithium into soluble lithium via roasting with calcium chloride (CaCl 2 ). The change of both Gibbs free energy and the logarithm of the equilibrium constant, which are taken as functions of temperature for the chlorination reaction of simulated slag with CaCl 2 , are predicted through the simulation with an enthalpy, entropy and heat capacity (HSC) programme. The simulation indicates that CaCl 2 is a favourable and effective chlorine donor in this chlorination reaction to yield lithium chloride (LiCl) when the temperature is not less than 500 °C. These predicted results are tested and confirmed experimentally. A maximum of 90.58% lithium recovery can be yielded with the optimal roasting conditions of a temperature of 800 °C for 60 min and a molar ratio of Cl/Li of 1.8:1, along with subsequent leaching conditions of 60 °C for 30 min with a water/calcines mass ratio of 30:1. X-ray diffraction (XRD) results suggest that most of LiAl(SiO 3 ) 2 in the slag disappears under the best reaction conditions and is transformed into LiCl.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Chun-xian Zhou,Peng-bo Wang,Bao Zhang,Lin-bo Tang,Hui Tong,Zhen-jiang He,Jun-chao Zheng
Li-rich cathode materials are regarded as ideal cathode materials, owing to their excellent electrochemical capacity. However, residual lithium compounds, which are formed on the surface of the materials by reacting with moisture and carbon dioxide in ambient atmosphere, can impair the surface structure, injure the capacity, and impede the electrode fabrication using Li-rich materials. Exposure to air atmosphere causes the formation of residual lithium compounds; the formation of such compounds is believed to be related to humidity, temperature, and time during handling and storage. In this study, we demonstrated for the first time an artificial strategy for controlling time, temperature, and humidity to accelerate exposure. The formation and effect of residual lithium compounds on Li-rich cathode material Li1.35[Ni0.35Mn0.65]O2 were systematically investigated. The residual lithium compounds formed possessed primarily an amorphous structure and were partially coated on the surface. These compounds include LiOH, Li2O, and Li2CO3. Li2CO3 is the major component in residual lithium compounds. The presence of residual lithium compounds on the material surface led to a high discharge capacity loss and large discharge voltage fading. Understanding the formation and suppressing the effect of residual lithium compounds will help prevent their unfavorable effects and improve the electrochemical performance.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Energy Materials
·
2022
·Vol. 12
·期 40
·2201800
·
IF 29.698
Jie Chen,Zexiao Cheng,Yaqi Liao,Lixia Yuan,Zhen Li,Yunhui Huang
Li metal batteries have suffered from dendrite growth and its derived dead Li formation for a long time. A new lithium restoration method through the shuttling of redox mediators has been proposed recently. However, the side reaction of severe self-discharge often occurs when some redox mediators are used. Here, a selection principle of redox mediators for reactivating dead Li in lithium metal batteries is put forward, which is able to reactivate the dead Li effectively and reduce the self-discharge at the same time. Three redox mediators of ferrocene (Fc), 10-methylphenothiazine (MPT), and thianthrene (Th) with different redox potentials are tested in LiFePO 4 |Cu anode-free Li metal batteries to clarify the selection principle. Furthermore, 2,2,6,6-tetramethylpiperidinooxy (TEMPO), which is speculated to be a suitable one for reactivating dead Li in lithium metal batteries, is verified. This work provides a universal selection principle of redox mediators and may boost its practical application in Li metal batteries.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Energy Storage Materials
·
2022
·
IF 20.831
Yan Liu,Yuan Li,Long Chen,Fang Yan,Zhihong Lin,Junmou Wang,Jingyi Qiu,Gaoping Cao,Biyan Wang,Hao Zhang
For high-specific energy Li batteries, hybrid anodes with graphite and Li metal are promising. However, the degradation of graphite-Li metal hybrid anodes during long cycles has been significantly fastened by dendritic Li growth and dead Li accumulation ascribed to the inferior solid electrolyte interphase (SEI). Efficient material construction strategies are highly demanded to inhibit the deactivation of graphite intercalation compounds (GICs: LiC 12 , LiC 6 , etc.) in graphite-Li metal hybrid anodes. Here, we introduced a physical-chemical modification strategy. Which is acted by a combination of a LiF-rich and elastic SEI and preset void in the composite electrodes, which was realized by Cu mesh current collectors, resulting in the retardant of the accumulation of dead Li and side reaction sediments on graphite surface and the retaining of the Li + insertion channels. The strategy ensured the long-term activity of both GICs and Li metal in graphite-Li metal hybrid anodes. Thus, the hybrid anodes obtain higher reversibility of both the lithium-ion insertion/deintercalation and Li metal deposition/dissolution processes. The batteries can maintain a specific capacity of up to 500 mAh/g, with an average CE of 98.5% for 85 cycles. This work presents a novel and effective methodology to realize the high reversibility of the high-capacity graphite-Li metal hybrid anodes.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
RARE METALS
·
2023
·Vol. 42
·期 6
·1969-1982
·
IF 8.8
Liao Jia-Lin,Zhang Shuai,Bai Tian-Sheng,Ji Feng-Jun,Li De-Ping,Cheng Jun,Zhang Hong-Qiang,Lu Jing-Yu,Gao Quan,Ci Li-Jie
Lithium metal batteries (LMBs) with a high theoretical capacity are seen as a type of the most potential energy storage system. Unfortunately, the growth of lithium dendrite, the irreversible side reactions, and the infinite volume alteration still curb the practical utilization of lithium metal anodes, resulting in low Coulombic efficiency (CE) and safety problems, etc. Herein, we synthesize a lithiophilic 3D copper foam host with uniformly distributed nano-flower-like ZnO particles (CuF/ZnO) and obtain the composite lithium metal anode containing the Li 2 O, LiZn alloy, and pure Li by the infusion of molten Li (CuF/Li 2 O-LiZn@Li). Benefitting from the advantages of the 3D structure of copper foam and the lithiophilicity of ZnO sites, the composite lithium metal anode can restrain the volume alternation and regulate the uniform deposition of lithium. The symmetrical cells of the composite lithium metal anode have a 1600 h long cycle life with a low polarization voltage of 15 mV, and the Coulombic efficiency can maintain about 97.8% at 1.0 mA·cm −2 , 1.0 mAh·cm −2 . Graphical abstract
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 12
·120535
·
IF 4.316
Jie Chen,Bin He,Zexiao Cheng,Zhixiang Rao,Danqi He,Dezhong Liu,Xiang Li,Lixia Yuan,Yunhui Huang,Zhen Li
Anode-free Li metal batteries are considered the ultimate configuration for next-generation high energy-density Li-based batteries due to the elimination of excess Li metal. However, the limited Li source aggravates issues such as dendrite growth and “dead” Li formation. Any Li loss caused by the SEI formation and dead Li has a great influence on the performance of the full cell. Here, we introduce LiI with shuttle effect to suppress the Li dendrites and reactivate the dead Li in the anode-free LiFePO4 (LFP) ∣Cu full cells. During cycling, the iodine transforms between I− and I3−, and a chemical reactions occur spontaneously between I3− and Li dendrites or dead Li. The generated Li+ in the electrolyte remains active in the following cycling. The anode-free LFP∣Cu cells deliver an initial discharge capacity of 139 mAh g−1 and maintain capacities of 100 mAh g−1 with a capacity retention of 72% after 100 cycles. Both the anode-free LFP∣Cu coin cells and pouch cells with LiI additive show much-improved performances. This work provides a new strategy for high-performance anode-free Li metal batteries.
研究领域:
电化学储能
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材料科学
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能源化学
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电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Lin-Pei Guo,Zhi-Yuan Guo,Jing Wang,Pan-Pan Zhang,Zhi-Hui Huang,Zhi-Yong Ji
Monovalent selective ion-exchange membranes have been widely used for lithium extraction from brine with a high Mg/Li ratio. However, extracting Li + directly from raw brine with high Na/Li ratio remains a significant challenge. This study introduces a flexible lithium selective composite membrane by incorporating lithium-ion conductor with a quaternized polymer. The lithium-ion conductor provides pathways for lithium transmission, while the quaternized polymer effectively hinders the leakage of impurity cations. As a result, with the applied voltage of 2.0 V, the membrane achieved a high Li + /Na + separation coefficient of 35.48 with a Li + flux of 8.33 × 10 −10 mol cm −2 s −1 in the simulated Yiliping brine, which are 56.3 and 2.8 times higher than that of commercial monovalent selective cation exchange membrane (CIMS). We proposed a lithium transport mechanism involving an adsorption-dehydration-diffusion process through the membrane. Theoretical calculations indicate that the combined effects of significant adsorption energy (−0.47 eV), low dehydration energy (515 kJ mol −1 ), and low diffusion barrier (0.37 eV) leads to the high selectivity for lithium. These findings provide promising prospects for the large-scale preparation of lithium ion-selective membranes, enabling the direct lithium extraction from raw brine.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Qi Jin,Kaixin Zhao,Xitian Zhang
The lithium–sulfur (Li–S) battery is an appealing choice for the next-generation high-energy-density energy storage systems . However, side reactions between lithium polysulfides (LiPSs) and Li metal anode cause the growth of Li dendrites, loss of active materials, and safety issues, which severely hinders the practical application of Li–S batteries. Constructing a protection layer on the surface of Li anode is an effective strategy to shield LiPSs and regulate lithium uniform deposition in Li–S batteries. Herein, we design and fabricate a lithiated Nafion protective layer to alleviate the side reactions between LiPSs and the Li anode and guide uniform deposition of Li, in which, their mechanism is investigated. The optimal protective layer effectively protects the Li anode from the detrimental side reactions, which boosts the stability of the Li anode. Li–Li and Li-stainless steel cells with 4 M [S] Li 2 S 8 electrolyte can last for more than 400 cycles and 100 cycles at current density of 1 mA cm −2 . A Li–S full cell also exhibits a high reversible capacity of 791.5 mA h g −1 after 250 cycles at 0.5 C. This work reveals the vital role of the artificial protective layer in enhancing the stability of the Li anode in Li–S batteries.
研究领域:
电化学
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能源材料
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电化学储能
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电池技术
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界面化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Cenjing Liao,Jinqi Zhu,Zhe Cui,Mengluan Gao,Wenqing Wang,Qian Liu,Rujia Zou
Lithium metal batteries (LMBs) have attracted wide attention as high-energy–density energy storage devices, but their practical applications are hindered due to capacity degradation and safety concerns arising from the growth of lithium (Li) dendrites. The interaction between the electrode and Li, encompassing both Li-ions and Li metal, display significant potential for solving Li-dendrite issues in LMBs. Here, a novel strategy is reported to thin hybrid coating (∼1.3 μm) comprising highly polar poly(vinylidene fluoride) (PVDF) and branched poly(ethyleneimine) (PEI) onto Cu foil, employed as a current collector for the Li metal anode. The branched PEI contains amine group side chains that effectively capture Li ions, thereby facilitating rapid Li-ion transfer kinetics. Moreover, the inclusion of PEI enhances the surface energy of the polymer coating, leading to a reduction in the nucleation radius of Li and the promotion of uniform Li deposition. When coupled with a LiFePO 4 (LFP) cathode, the Li-E40V@Cu||LFP full cell demonstrates an impressive initial capacity of 141.8 mA h g −1 , which remains at 118.1 mA h g −1 after 518 cycles at 1C (1C = 170 mA h g −1 ). This investigation presents a novel approach to alleviate the formation of dendrites on Li metal anodes.
研究领域:
能源存储
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材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Junying Zhao,Dongjiang Chen,Bismark Boateng,Guangfeng Zeng,Yupei Han,Cheng Zhen,John B. Goodenough,Weidong He
Separator-lithium anode interface featured with uniform lithium-ion plating/stripping is of paramount importance for the safe operation of batteries. Lithium anode paired with traditional polyolefin separator is considerably challenged with uncontrolled formation of Li dendrites, giving rise to undesirable rate capacity and cycle life. In this work, through an electrophoretic deposition technique, hexafluoropropylene separator embedded with atomic interlamellar lithium-channel phyllosilicate clay is realized. With large absorption with electrolyte, the separator with interlamellar spacing of 1.31 nm provides abundant active sites for Li + and enables fast transfer of lithium ions, giving rise to an ionic conductivity of 5.66 × 10 −4 S cm −1 at ambient temperature. The parallel interlayers unify the direction of Li + flows, which leads to the uniform deposition of Li + on the anode and effectively eliminates lithium dendrite issues in Li + plating/stripping processes. The cell assembled with the robust polymer/clay separator is more advantageous than state-of-the-art in the literature, delivering a reversible capacity of 152 mAh g −1 with a 98.5% capacity retention after 300 cycles at 0.5C.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Jianxiong Xing,Tao Chen,Zihao Wang,Zhicui Song,Chaohui Wei,Qijiu Deng,Qiang Zhao,Aijun Zhou,Jingze Li
Lithium (Li) metal anode (LMA) is one of the most promising anodes for high energy density batteries. However, its practical application is impeded by notorious dendrite growth and huge volume expansion. Although the three-dimensional (3D) host can enhance the cycling stability of LMA, further improvements are still necessary to address the key factors limiting Li plating/stripping behavior. Herein, porous copper (Cu) foam (CF) is thermally infiltrated with molten Li-rich Li-zinc (Li-Zn) binary alloy (CFLZ) with variable Li/Zn atomic ratio. In this process, the LiZn intermetallic compound phase self-assembles into a network of mixed electron/ion conductors that are distributed within the metallic Li phase matrix and this network acts as a sublevel skeleton architecture in the pores of CF, providing a more efficient and structured framework for the material. The as-prepared CFLZ composite anodes are systematically investigated to emphasize the roles of the tunable lithiophilicity and hierarchical structure of the frameworks. Meanwhile, a thin layer of Cu-Zn alloy with strong lithiophilicity covers the CF scaffold itself. The CFLZ with high Zn content facilitates uniform Li nucleation and deposition, thereby effectively suppressing Li dendrite growth and volume fluctuation. Consequently, the hierarchical and lithiophilic framework shows low Li nucleation overpotential and highly stable Coulombic efficiency (CE) for 200 cycles in conventional carbonate based electrolyte. The full cell coupled with LiFePO 4 (LFP) cathode demonstrates high cycle stability and rate performance. This work provides valuable insights into the design of advanced dendrite-free 3D LMA toward practical application.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Cuilian Liu,Hongzhang Zhang,Tianyu Li,Wei Liu,Chao Qu,Xiaofei Yang,Xianfeng Li
Prelithiation is a highly attractive technique to offset the irreversible lithium loss caused by the formation of the SEI film during the first charging cycle in lithium-ion batteries. Li 3 N is an ideal prelithiation reagent due to its high theoretical specific capacity, proper decomposing potential and no residues after decomposition. However, the chemical instability of Li 3 N inevitably limits its large-scale use as prelithiation additives. Here we successfully developed a facile surface passivation method to improve the stability of Li 3 N by immersing Li 3 N in both fluoroethylene carbonate (FEC) and Vinylenecarbonate (VC) to in situ generate a coating layer on the Li 3 N surface via the spontaneous decomposition of the solvents. The coating composed of LiF, Li 2 CO 3 and lithium carbonate organics enables excellent stability of Li 3 N in the ambient environment. Remarkably, surface-passivated Li 3 N display a high prelithiation capacity of 1799 mAh/g and maintain a high capacity of 1612 mAh/g (almost 90 % of initial capacity) after exposed to humid air with 12 % relative humidity for 26 h. The effect of the compensation of lost active lithium is verified via a LiFePO 4 @ex-Li 3 N-coated//HC full cell, which exhibits not only a high capacity but also a stable cycling performance. The specific energy of LiFePO 4 @ex-Li 3 N-coated//HC full cell shows a remarkable increase compared to the LiFePO 4 //HC full cell, exhibiting ~29 % more specific energy after the 1st cycle, even Li 3 N-coated have been exposed to air with 12 % relative humidity for 26 h before use.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）