CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Guiling Luo,Xiaowei Li,Linlin Chen,Yuning Zhang,Jun Gu,Yanhong Chao,Wenshuai Zhu,Zhichang Liu,Chunming Xu
Extracting lithium from salt lakes is an effective way to relieve the shortage of lithium resources. Electrochemical lithium extraction has attracted wide attention due to its high selectivity , eco-friendliness, and high-efficiency. Functional surface coating is an effective approach to improve the cycling performance, stability, and conductivity of the electroactive materials. In this work, LiMn 2 O 4 (LMO) electrode materials were prepared via sol–gel method with island-like CeO 2 coating (CeLMO) for lithium electrochemical adsorption from simulated brine. CeO 2 is helpful to inhibit the agglomeration of active metal oxides and promote the contact and electron transfer between metal oxides. Based on the results from X-ray diffraction, X-ray photoelectron, and Raman spectroscopy , the fate of lithium intercalation and deintercalation in CeLMO is illuminated. CeLMO-2//Ag electrochemical system can produce 96% pure Li + from Li 2 CO 3 precipitated mother liquor, and the adsorption capacity is 36.52 mg·g −1 . The capacity retention after 30 cycles was 60% at 50 mA·g −1 , and the Mn dissolution loss rate is 0.016%. In summary, island-like oxide coating improves electrochemical lithium adsorption efficiency and is a promising technology for producing battery-grade lithium products.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
Sustainable Energy & Fuels
·
2024
·Vol. 8
·期 4
·826-836
·
IF 5
Jingyi Kong,Hanling Guo,Yuan Li,Min Gong,Xiang Lin,Liang Zhang,Dongrui Wang
Aqueous Zn metal batteries are a promising candidate for low-cost, safe, and sustainable energy storage systems. Nonetheless, the practical application of such batteries is still impeded by the inferior Zn anode performance and instability of the cathode. Herein, we investigate the performance of an aqueous Zn‖LiMn2O4 (Zn‖LMO) hybrid battery with a bi-salt (ZnSO4 and Li2SO4) electrolyte modified with a low dosage of poly(ethylene glycol) (PEG200) and MnSO4. The PEG additive effectively inhibits water decomposition, mitigates Zn metal corrosion, and promotes the in-plane growth of hexagonal Zn flakes. As a result, the reversibility of Zn plating/stripping and the long-term cyclability of the Zn‖LMO hybrid battery can be substantially enhanced in the modified electrolyte. Specifically, in our optimized electrolyte ZL-8% PEG-0.1 Mn, the Zn‖LMO hybrid battery exhibits an initial capacity of 91.2 mA h g−1 and a capacity retention of 50% in 500 cycles at 2C, along with improved coulombic efficiency and self-discharge behavior. This dual-additive strategy can be used to design low-cost, highly reversible, safe, and long-cycling Zn–Li hybrid-ion batteries for practical applications.
研究领域:
电化学
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能源材料
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储能技术
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无机化学
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应用化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Mei Yang,Jiao Ma,Ling Xia,Yujiao Guo,Xiaofang Liu,Wei Bai,Mingwu Xiang,Junming Guo
The spinel LiMn 2 O 4 cathode material shows severe capacity degradation due to Jahn–Teller distortion and dissolution of Mn during the charge-discharge process. Herein, a series of single crystal truncated octahedral of LiFe 0.03 B x Mn 1.97−x O 4 (0≤x≤0.10) were synthesized by simple solid-state combustion combined with Fe-B co-doping, morphology and particle size controlling strategy. Through Fe-B co-doping, not only the LiFe 0.03 Mn 1.97 O 4 containing {111}, {100} and {110} planes are successfully controlled to the particles containing only {111} and {100} planes, but also the near-nanometer particles are controlled to bigger submicron sizes. It is found that Fe-B co-doping can enhance the stability of the crystal structure, inhibit Jahn-Teller distortion and reduce the dissolution of Mn. Among them, the optimized LiFe 0.03 B 0.08 Mn 1.89 O 4 forms a truncated octahedral single crystal particle with good crystallization and only {111} and {100} crystal faces, and the particle size is around 349.3 nm, showing exceptional high rate capacity and long cycle life. The LiFe 0.03 B 0.08 Mn 1.89 O 4 releases a high initial discharge capacity of 107.1 mAh/g with a capacity retention of 77.7% after 1000 cycles at 10 C, which is higher than that of the LiFe 0.03 Mn 1.97 O 4 (58.8%). Even at 20 C, LiFe 0.03 B 0.08 Mn 1.89 O 4 still achieves a high reversible specific capacity (90.4 mAh/g) and outstanding long-cycle stability (81.3%, 1000th). This work provides a scientific basis for the crystal surface control and particle size control of spinel LiMn 2 O 4 , which is of great significance for the development of the next generation of high-power lithium-ion batteries.
研究领域:
材料科学
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电化学
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能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 35
·16101-16111
·
IF 3.591
Changwei Su,Ruifang Chen,Zhaoyao Sa,Hong Li,Mingwu Xiang,Junming Guo,Wei Bai,Xiaofang Liu
A simple and rapid microwave-induced solution flameless combustion method to prepare high-capacity Ni–Cu co-doped spinel LiMn2O4 is provided in this work. Ni–Cu co-doping effectively reduces the lattice parameters and Jahn–Teller effect of the spinel LiMn2O4 to obtain a more stable crystal structure. The microscopic morphological characteristics clarify that the growth and development of grains is significantly controlled by microwave treatment and Ni–Cu co-doping. The optimized LMNCO-0.050 electrode exhibits a higher initial discharge capacity of 128.1 mA h g−1 than the un-doped LMO electrode of 120.6 mA h g−1 at 1 C and room temperature. In particular, the LMNCO-0.050 electrode achieves high initial discharge specific capacities of 111.3 and 106.8 mA h g−1 at high rates of 5 C and 10 C, corresponding to excellent retention rates of 70.89% and 77.43% after 1000 cycles. Moreover, the excellent retention of 41.89% of the LMNCO-0.050 electrode after 1000 ultra-long cycles at 55 °C and 1 C can be attributed to the improved structural stability of the LiMn2O4 by Ni–Cu co-doping.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Xiaohong Shang,Bin Hu,Boshuang Zhang,Yiwen Wang,Jianmao Yang,Jianyun Liu
The escalating global demand for lithium, driven by the green energy transition, necessitates efficient lithium extraction strategies from salt-lake brine and seawater. This study introduces a porous LiFexMn2–xO4 hollow nanofibers (LFMO-h), synthesized by electrospinning and calcination. This material features a well-defined one-dimensional (1D) hollow architecture composed of interconnected spinel nanocrystals (∼80 nm), which establishes ultrashort ion diffusion pathways and abundant active surfaces, enabling ultrafast Li+ transport and rapid adsorption kinetics. The ion diffusion coefficient of LFMO-h is as high as ∼6.6 × 10–10 cm2 s–1, ten times faster than bulky LMO (LMO-s). As a cathode in a hybrid capacitive deionization system, LFMO-h achieves a high Li+ adsorption capacity of ∼1.4 mmol g–1 with an energy consumption of ∼4.7 Wh mol–1. Remarkably, LFMO-h presents a super Mg2+/Li+ selectivity (αMg2+Li+ = 180 at CMg2+/CLi+ = 60), while maintaining structural integrity and negligible Mn dissolution during prolonged cycling, attributed to synergistic Fe-doping and dense arrangement of nanocrystals. Even in the simulated high Mg2+ salt-lake brine, LFMO-h retains its high adsorption capacity and selectivity, demonstrating robustness under practical conditions. This work pioneers an accelerated diffusion-adsorption strategy through 1D hollow nanofiber engineering for energy-efficient lithium recovery technologies.
研究领域:
材料科学
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能源技术
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电化学
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纳米技术
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
Nano Research
·
2024
·Vol. 17
·期 6
·5168-5178
·
IF 9.5
Liu Yu,Xie Dehui,Shi Yuxin,Lv Rongguan,Chang Yingna,Sun Yuzhen,Zhao Zhiyuan,Wang Jindi,Song Kefan,Wu Huayu,Hoang Tuan K. A.,Xing Rong,Pang Huan
Aqueous rechargeable batteries (ARBs) are generally safer than non-aqueous analogues, they are also less-expensive, and more friendly to the environment. However, the inherent disadvantage of the narrow electrochemical window of H 2 O seriously restricts the energy density and output voltage of ARBs, especially aqueous rechargeable Fe-based batteries. Herein, we introduce a new battery system: the anode contains C@Fe/Fe 2 O 3 composite, which is interfaced with an alkaline electrolyte; the cathode contains LiMn 2 O 4 in contact with a neutral electrolyte. A Li + -conducting membrane is carefully selected to decouple the electrode-electrolyte, which effectively widens the electrochemical window to above 2.65 V, thereby enables an aqueous rechargeable iron battery. Its average output voltage is 1.83 V and its energy density is 235.3 Wh/kg at 549 W/kg. In this work, we propose the energy storage mechanism with the aid of density functional theory (DFT). The calculated reduction potential of the anode agrees with the experimental value. Furthermore, this battery system demonstrates long cycle lifespan of approximately 2500 cycles at 2 A/g, corresponding to a capacity retention of 82.1%. These results are very far superior than those of mainstream aqueous rechargeable Fe-based batteries, which guarantee future investigation for storing electricity energy.
研究领域:
储能
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电化学
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材料科学
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电池技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Caiyan Shen,Huinan Yu,Zhiyuan Xue,Guorong Hu,Yanbing Cao,Zhongdong Peng,Ke Du
LiMn 2 O 4 is considered to be a promising cathode material for lithium-ion batteries due to its decent energy density, low price and environmental benignity. However, the problems of Mn dissolution, migration and deposition during the cycle, seriously affect its lifespan, especially at high temperature. In this study, we developed a strategy by which we killed two birds with one stone. A low molecular weight polyacrylic acid (PAA) mixed with sodium carboxymethyl cellulose (CMC) is applied as binder and coating agent for cathode particles at the same time. The conventional and environmental unfriendly polyvinylidene difluoride (PVDF)-N-methylpyrrolidone (NMP) system is replaced by the cheap and green aqueous binder with improved adhesive effect. Furthermore, the binder-based surface coating layer not only alleviates the side reaction between the electrolyte and the cathode particles, but also chelates the dissolved Mn 2+ by the large amount of carboxyl groups in PAA molecules and so prevents the following migration and deposition of Mn 2+ . In the button half-cell with low molecular weight PAA based binder, the capacity retention reaches 94.1 % after 1000 cycles at room temperature and 92.0 % after 200 cycles at 60 degrees centigrade. Meanwhile, 18650-type cylindrical cells were prepared with this binder, which shows a great high temperature storage performance. After the cell was held at 60 degrees centigrade for 25 days at full charged state, the internal resistance increased by only 1.25mΩ, the voltage decreased by only 0.1 V, the residual capacity retention and recovery capacity retention reaches 85.6 % and 92.2 %. This work shows the great potential of the aqueous binder in dealing with the problem of Mn dissolution during the cycling of manganese-based cathode materials for lithium-ion batteries.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 25
·14891-14898
·
IF 3.361
Junyu Xiang,Pengxue Zhang,Shixian Lv,Yongjun Ma,Qi Zhao,Yan Sui,Yuncheng Ye,Chuanli Qin
Spinel LiMn2O4 (LMO) with a three-dimensional structure has become one of the cathode materials that has gained the most interest due to its safety, low price and abundant resources. However, the lithium ion transmission is limited by large particle size and particle agglomeration of LMO. Thus, reducing the particle size and agglomeration of LMO can effectively improve its lithium ion transmission. Here, we synthesized a LMO cathode material with a nanoscale crystal size using the flexible expanded graphite (EG) soft template and Pichini method. EG-controlled particle size and particle agglomeration of LMO is conducive to charge transfer and diffusion of lithium ions between LMO and the electrolyte, meanwhile, there are more redox sites on the nanosized LMO particles, which makes the redox reaction of LMO more thorough during the charge and discharge process, resulting in high capacitance performance. In order to obtain the considerably required lithium-ion capacitors (LICs) with high energy density and power density, we assembled aqueous LMO//activated carbon (AC) LICs with 5 M LiNO3 as the aqueous electrolytes, which are environmentally friendly, safe, low cost and have higher electrical conductivity than organic electrolytes. The optimal LIC has an energy density of 32.63 W h kg−1 at a power density of 500 W kg−1 and an energy density of 8.06 W h kg−1 at a power density of 10 000 W kg−1, which is higher than most of the LMO-based LICs in previous reports. After 2000 cycles, the specific capacitance retention rate was 75.9% at a current density of 3 A g−1. Therefore, our aqueous LMO//AC LICs synthesized by the soft template/Pichini method have wide prospects and are suitable for low-cost, high-safety and high-power applications.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Guiying Tian,Jian Gao,Minrui Wang,Xintao Wen,Yutong Liu,Jun Xiang,Lei Zhang,Penggao Cheng,Jianping Zhang,Na Tang
Current explosive demand in raw lithium greatly boosts lithium mining, and electrochemical Li-extraction using spinel LiMn 2 O 4 (LMO) from original brine has gained much attentions. In this study, Cr-doped LMO is prepared via a facile precipitation-calcination to elucidate the structural alterations and suppress Jahn-Teller distortion, and a novel hybrid capacitive deionization (HCDI) system of “Li-poor LiMn 1.8 Cr 0.2 O 4 ||brine (recovery liquid)||activated carbon” is constructed for electrochemical Li-extraction. The results prove that Cr-doping effectively suppresses Mn 3+ disproportionation induced by Jahn–Teller distortion, leading to a stabilized spinel framework for long lifespan. Importantly, the Cr-doping LMO realizes a stable (de)lithiation over 500 cycles with low manganese dissolution rate of 0.027% per cycle. Meanwhile, the Li-extraction capacity can reach 22 mg g −1 in 1.0 M LiCl electrolyte with retention rate of 86.05% after 500 cycles. In the assembled HCDI system, average Li-extraction capacity in brine reaches ∼15 mg g −1 after 15 cycles. Therefore, the HCDI system using Cr-doping LMO could introduce a new perspective for the industrial Li-extraction facing original brine.
研究领域:
材料科学
·
电化学
·
能源存储
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
Energy Technology
·
2022
·Vol. 10
·期 9
·2200163
·
IF 4.149
Yan Cui,Jiahui Chen,Jingyang Zhao,Zhen Ma,Yuming Tan,Jianjun Xue,Hanliang Xu,Junmin Nan
Based on a strategy of stabilizing the LiMn 2 O 4 (LMO) cathode interface, the high-temperature cycling and storage performance of 18 650-type LMO/graphite lithium-ion batteries (LIBs) is effectively improved. The LMO cathode is prepared using lithium carboxymethyl cellulose (CMCLi)–polyacrylic acid/acrylate copolymer composite binder and nanoscale CaCO 3 functional component (marked as binder C). Compared with the traditional oily binder, the dissolution of Mn 2+ from LMO cathode into the electrolyte can effectively decrease, and the structure stability of LMO cathode can increase. The batteries exhibit retention capacity of 80.3% at 1 C after 600 cycles at room temperature and 76.7% at 1 C after 200 cycles at temperature of 45 °C. The high-temperature storage performance is also improved and there are 81.1% and 73.5% residual capacities when the fully charged batteries are stored in 60 °C for 14 and 28 days. The enhanced performance is mainly attributed to the interfacial stability of LMO cathode due to the bonding ability of composite binders and the elimination of HF by CaCO 3 . These results reveal the application prospect of as-developed aqueous binders and provide a way to improve the performance of LMO-based LIBs through stable interface strategy.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Xin Yang,Kaijie Liu,Xinyu Han,Jianheng Xu,Mengyao Bian,Daying Zheng,Haijiao Xie,Yibo Zhang,Xiangguang Yang
It is essential to develop the catalyst for NH 3 -SCR with excellent performance at ultra-low temperature (≤150 °C), and resource recycling is another important part of environmental protection. Based on the principle of environmental friendliness, the LiMn 2 O 4 , one of the waste battery cathode materials, was successfully modified into a novel high-value catalyst for ultra-low temperature NH 3 -SCR through hydrogen ion exchange and two-dimensional vanadic oxide modification. The optimized LiMn 2 O 4 -0.5V-10H catalyst performed the best balance of NO x conversion and N 2 selectivity , with activity reaching 96 % at 150 °C and N 2 selectivity exceeding 70 % at ultra-low temperature. Due to the unique three-dimensional network structural characteristics of LiMn 2 O 4 spinel, hydrogen exchange could exchange Li + from the lattice and increase surface acidity; and a small amount of two-dimensional vanadic oxide loading could appropriately regulate redox ability and increase acidic sites. The in-situ DRIFTS results still showed that the L-H and E-R mechanisms coexisted during the reaction. Moreover, combining first-principles calculations and in-situ DRIFTS, the dual modification of H and V could enhance the adsorption of NH 3 on the surface of LiMn 2 O 4 but weaken the adsorption of NO, and promote the decomposition of nitrites while inhibit the formation of surface nitrate species, which was the core reason for the improvement of N 2 selectivity. The modification mode in this work was simple and inexpensive, which provided a new idea for the high-value utilization of waste batteries and the design of NO x purification catalyst at ultra-low temperature.
研究领域:
环境科学
·
催化
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Frontiers of Chemical Science and Engineering
·
2023
·Vol. 17
·期 12
·2050-2060
·
IF 4.5
Ren Jiahui,He Yongping,Sun Haidong,Zhang Rongzi,Li Juan,Ma Wenbiao,Liu Zhong,Li Jun,Du Xiao,Hao Xiaogang
Reducing the dissolution of Mn from LiMn 2 O 4 (LMO) and enhancing the stability of film electrodes are critical and challenging for Li + ions selective extraction via electrochemically switched ion exchange technology. In this work, we prepared a nitrogen-doped carbon cladding LMO (C-N@LMO) by polymerization of polypyrrole and high-temperature annealing in the N 2 gas to achieve the above purpose. The modified C-N@LMO film electrode exhibited lower Mn dissolution and better cyclic stability than the LMO film electrode. The dissolution ratio of Mn from the C-N@LMO film electrode decreased by 42% compared to the LMO film electrode after 10 cycles. The cladding layer not only acted as a protective layer but also functioned as a conductive shell, accelerating the migration rate of Li + ions. The intercalation equilibrium time of the C-N@LMO film electrode reached within an hour during the extraction of Li + ions, which was 33% less compared to the pure LMO film electrode. Meanwhile, the C-N@LMO film electrode retained evident selectivity toward Li + ions, and the separation factor was 118.38 for Li + toward Mg 2+ in simulated brine. Therefore, the C-N@LMO film electrode would be a promising candidate for the recovery of Li + ions from salt lakes.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）