JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Fengyin Zhou,Jianye Ma,Hongya Wang,Muya Cai,Xin Qu,Jingjing Zhao,Danfeng Wang,Yuqi Cai,Dihua Wang,Huayi Yin
The utilization of biomass-assisted pyrolysis in the recycling of spent lithium-ion batteries has emerged as a promising and reliable process. This article furnishes theoretical underpinnings and analytical insights into this method, showcasing sawdust pyrolysis reduction as an efficient means to recycle spent LiMn 2 O 4 and LiNi 0.6 Co 0.2 Mn 0.2 O 2 batteries. Through advanced thermogravimetry-gas chromatography-mass spectrometry analysis complemented by traditional thermodynamic demonstration, the synergistic effects of biomass pyrolysis reduction are elucidated, with minor autodecomposition and major carbothermal and gasthermal reduction pathways identified. The controlled manipulation of transition metals has demonstrated the capability to modulate surface pyrolysis gas catalytic reactions and facilitate the preparation of composite materials with diverse morphologies. Optimization of process conditions has culminated in recovery efficiency exceeding 99.0 % for LiMn 2 O 4 and 99.5 % for LiNi 0.6 Co 0.2 Mn 0.2 O 2 . Economic and environmental analyses underscore the advantages of biomass reduction and recycling for these two types of spent LIBs: low energy consumption, environmental compatibility, and high economic viability.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Chemistry
·
2024
·
IF 6.7
Yifei Chen,Zhihui Qian,Qin Zhu,Ling Xia,Wei Bai,Mingwu Xiang,Yujiao Guo,Shulei Chou,Ping Ning,Junming Guo
Rapid capacity fade of spinel LiMn 2 O 4 cathode material limits the application of lithium-ion batteries. Herein, the introduction of La/B elements achieves the dual-modification of surface coating and single-crystal truncated morphology, ensuring the compatibility of rate capability and cycling stability. The La and B introduction enables the in situ formation of LaBO 3 coating layer. Both the LaBO 3 coating and truncated morphology prevent the direct exposure of the cathode to the electrolyte, decreasing the Mn dissolution and providing the additional Li + diffusion channels. The increase of La and B modification partially restrains the development of {110} crystal planes. The refinement manifests that the La 3+ /B 3+ doping partially replaces Mn 3+ of the LiMn 2 O 4 , inhibiting the Jahn-Teller effect and stabilizing the [MnO 6 ] skeleton. Consequently, the optimized LiMn 2 O 4 @0.04LaBO 3 with the favorable LaBO 3 coating thickness and two truncated octahedrons exhibits the excellent electrochemical properties at high current rate. The first discharge capacities of 109.1, 104.2 and 96.9 mAh⋅g −1 are obtained, whilst the capacity retentions of 64.8 % (after 2000 cycles), 65.8 % (after 2000 cycles) and 80.5 % (after 1000 cycles) can be maintained at 5 C, 10 C and 20 C, respectively. Even at 5 C and 55 °C, the high initial discharge capacity of 113.6 mAh⋅g −1 and good cycling lifespans can be achieved. This modification strategy provides valuable insight for preparing the advanced LiMn 2 O 4 cathode materials for lithium-ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Jing Wang,Jia-Wei Fang,Zhi-Yong Ji,Zhi-Yuan Guo,Xin-Wei Li,Jie Liu,Ying-Ying Zhao,Zhong Liu,Feng-Feng Gao,Yuan Zhong,Jun-Sheng Yuan
Lithium extraction from the solution in low Li + concentration by an energy-saving and high-efficiency method is still a challenge. Herein, a novel hollow porous LiMn 2 O 4 (H-LMO) with highly active site was proposed to enhance the extraction performance of Li + . Based on the established hollow porous structure, the H-LMO film electrode (H-LMOE) exhibits excellent lithium electrosorption performance and stability. Under the current density of 0.5 C, the electrosorption capacity of Li + could reach 31.52 mg/g, the separation coefficient of Li + /Mg 2+ was 581.67, and the energy consumption was as low as 0.49 Wh/mol Li. This unique structural strengthening mechanism made H-LMOE maintain a good Li + extraction performance even in a solution of low Li + concentration. The Li + electrosorption capacity of H-LMOE was 2.13 times that of T-LMOE in a 60 mg/L Li + solution, while the specific energy consumption of the H-LMOE was 15.78% lower than that of the traditional-LiMn 2 O 4 film electrode (T-LMOE). Even in a 10 mg/L Li + solution, the electrosorption capacity of H-LMOE was 21.48 mg/g, which was 10.0% higher than that of T-LMOE. Moreover, after 50 recycling processes, the final electrosorption capacity of the H-LMOE was about 25.0% higher than that of the T-LMOE.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Yue Yu,Yujiao Guo,Ping Ning,Haibibu Aziguli
The spinel LiMn 2 O 4 is considered a promising cathode option material because it provides three-dimensional pathways for Li-ion diffusion. However, LiMn 2 O 4 exhibits insufficient rate capabilities and rapid structural deterioration during prolonged cycling, particularly under conditions of high current or elevated temperatures. Herein, we introduce a Mg 2+ /Al 3+ co-doping strategy to evade these problems. As a result, the co-doping of Mg 2+ and Al 3+ facilitates the development of a polyhedral morphology, enhancing both structural stability and rapid Li-ion diffusion. Furthermore, the incorporation of Mg 2+ and Al 3+ , which have a stable electronic configuration, enhances structural stability through their relatively stronger Mg O and Al O bonds compared to the Mn O bond. Therefore, the LiMg 0.02 Al 0.08 Mn 1.90 O 4 delivers the first discharge capacity of 107.6 mAh‧g −1 at 1 C. Importantly, the LiMg 0.02 Al 0.08 Mn 1.90 O 4 cathode achieves long cycling lifespans exceeding 1000 cycles at high current rates of 20 C. A capacity retention of 70.0 % is retained at 20 C after 1000 cycles, as well as a high-temperature capacity retention of 47.4 % after 500 cycles at 5 C and 55 °C. Moreover, the Mg 2+ /Al 3+ co-doping facilitates the kinetic process of Li + migration, leading to a relatively high Li + diffusion coefficient and a low apparent activation energy.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHEMISTRY COMMUNICATIONS
·
2022
·
IF 5.443
Hao Li,Liang Xue,Mingzhu Ni,Serguei V. Savilov,Sergey M. Aldoshin,Hui Xia
Spinel LiMn 2 O 4 (LMO) is a promising cathode material for lithium-ion batteries (LIBs) due to its low cost, high safety, and high energy density. However, surface dissolution of manganese and irreversible phase transitions reduce its long-term cycling performance. Although surface coating is a promising strategy for improving the structural stability of LMO, the commonly used coating process is tedious and complicated. In this work, a one-step sintering process is developed to prepare LMO materials coated in situ with MnBO 3 . It is found that the MnBO 3 layer formed in this way is uniformly coated on the surface of LMO, and effectively suppresses Mn dissolution and undesirable phase transition during repeated charge/discharge cycles. Furthermore, the MnBO 3 -coated LMO has improved electrode kinetics, demonstrating significantly improved rate performance compared to the pristine LMO. As a result, the optimized LMO sample exhibits 85.2% capacity retention after 1000 cycles at 1 C and still can deliver 96 mAh g −1 , even at 5 C. This work proposes a facile and efficient coating strategy for improving the electrochemical performance of LMO as a cathode material for LIBs.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Materials
·
2020
·
IF 2.705
Li Xinxi,Liu Long,Li Shumin,Guo Lin,Li Bin,Zhang Guoqing
Spinel lithium manganese oxide (LiMn2O4) based Li-ion battery (LIB) is attractive for hybrid/full electric vehicles because of its abundant resources and easy preparation. However, operation under an elevated temperature could cause severe capacity fading of the spinel cathodes. In this work, 1, 3-propane sultone (PS) is investigated as an electrolyte additive for improving the cyclability of the LiMn2O4/graphite LIB at elevated temperature. The charge and discharge measurement proves that PS can significantly enhance the cyclability of 053048-type LiMn2O4/graphite pouch cell at 60°C. Compared to the cell without additive, the capacity retention of the cell using electrolyte with 5% PS increases from 52 to 71% after 180 cycles. The improved cyclability is attributable to the modification of the solid electrolyte interface (SEI) on both positive and negative sides of the LiMn2O4/graphite cell by PS, which effectively prevents anode and cathode from structural breakdown and inhibits the electrolyte decomposition.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Yanyan Kong,Jiaxiang Sun,Ligang Gai,Xiaojuan Ma,Jianhua Zhou
Aqueous rechargeable batteries (ARBs) based on migration of two types of shuttle ions not only enrich the battery families but also make it more available for ARBs with operation potential higher than 1.2 V. In this paper, we report on electrochemical properties of ARBs in configuration of NaTi 2 (PO 4 ) 3 /C||LiMn 2 O 4 , i.e. NTP/C||LMO. NTP/C was prepared through a simple and scalable co-precipitation post annealing treatment method and featured with hierarchical structure, high specific surface area, and abundant mesopores. The electrochemical properties of individual anode and cathode were examined in 1 mol L −1 Li 2 SO 4 , 1 mol L −1 Na 2 SO 4 , and 0.5 mol L −1 Li 2 SO 4 /0.5 mol L −1 Na 2 SO 4 mixed electrolyte, respectively. It is found that NTP/C exhibits superior operation in 1 mol L −1 Na 2 SO 4 and inferior operation in 1 mol L −1 Li 2 SO 4 while the situation is contrary for LMO. However, NTP/C||LMO full cells with Li + /Na + -mixed electrolyte exhibit enhanced electrochemical performance, presenting an anode-dependant electrochemical behavior. When operating at 1C, NTP/C||LMO with Li + /Na + -mixed electrolyte can deliver a discharge specific capacity ( C dis ) of 104.6 mA h g −1 based on the weight of NTP/C, and a specific energy ( E cell ) of 59.5 W h kg −1 with corresponding specific power of 76.8 W kg −1 based on the total weight of active electrode materials. After 220 cycles at 1C, the C dis and E cell remain 75.7 mA h g −1 and 43.0 W h kg −1 , respectively.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ChemSusChem
·
2019
·Vol. 13
·期 4
·803-810
·
IF 7.804
Chengyi Zhu,Yannan Zhang,Xiaohua Yu,Peng Dong,Jianguo Duan,Jiaming Liu,Jianxiong Liu,Yingjie Zhang
Graphical Progress towards the positive : A facile strategy through manipulating KMnO 4 concentration is introduced to precisely fabricate 1 D LiMn 2 O 4 nanorods with four distinct diameter gradients. The LiMn 2 O 4 nanorod with a critical diameter of approximately 70–80 nm displays the highest discharge capacity and promising cycling performance. The role of 1 D crystal size in effecting interface chemical species and electrochemical performance is elucidated by comparative characterization methods. The morphology and size of nanoelectrode materials determine their properties. Compared to the bulk structure electrodes, 1 D electrode materials for Li-ion batteries have been intensively studied owing to their excellent Li + diffusion kinetics. It is generally accepted that smaller-sized electrode materials lead to better Li storage kinetics. In this study, this is found to not be the case in 1 D LiMn 2 O 4 positive materials. A facile strategy of manipulating the KMnO 4 concentration is introduced to precisely fabricate 1 D LiMn 2 O 4 nanorods with four distinct diameter gradients from 30 to 170 nm. The role of 1 D crystal size in effecting interface chemical species and electrochemical performance is elucidated by comparative characterization methods. X-ray photoelectron spectroscopy (XPS) Ar-ion etching technology shows that the Mn 2+ is electrochemically inactive on the surface of the sample, which explains the adverse effects observed on LiMn 2 O 4 nanorods with the minimum diameter of 30–40 nm, such as decreased discharge capacity. The LiMn 2 O 4 nanorod with a critical diameter of approximately 70–80 nm displays the highest discharge capacity and promising cycling performance. This work clarifies an important property that has previously been neglected and deepens the understanding for design of Mn-based positive materials.
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
·
2019
·
IF 5.383
Xue-Jiao Nie,Xiao-Tong Xi,Yang Yang,Qiu-Li Ning,Jin-Zhi Guo,Mei-Yi Wang,Zhen-Yi Gu,Xing-Long Wu
In the extensive application processes of lithium ion batteries (LIBs), a great quantity of spent LIBs is producing, which is harmful to human and the environment if not handled properly. In addition, due to the scarcity of lithium on earth, sodium with relatively high abundance and low cost is expected to replace lithium. Hence, it is an interesting and urgent work of reusing the spent materials from the end-of-life LIBs for designing sodium-ion batteries (SIBs). Herein, an efficient method is proposed to recycle the spent LiMn 2 O 4 and directly reuse it as the cathode of SIBs. As electrochemical tests show, such recycled LiMn 2 O 4 delivers excellent Na-storage properties in SIBs. For example, its discharge capacity can gradually increase to 163.2 mAh g −1 over 50 cycles at 100 mA g −1 , and the highest reversible capacity is up to 176.3 mAh g −1 at 20 mA g −1 . It is further revealed by combining the electrochemical analyses and ex-situ characterizations that, the continuous increase of capacity during the initial 50 cycles is due to the phase transition of the spinel into layered structure caused by the Li + /Na + (de)insertion. Studies of electrode kinetics indicate the faster ion diffusion in the layered material than the spinel one. This work provides a new strategy to recycle the spent LIBs, i.e., directly reusing the exhausted electrode materials to the next-generation batteries.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Yujiao Guo,Yue Yu,Ping Ning,Jiangzhao Chen
Spinel LiMn 2 O 4 has the potential to be used as a cathode material in lithium-ion batteries because of its affordability, low toxicity, and excellent charge/discharge capability. However, severe capacity attenuation results from the degradation of its long-cycle and high-rate performance caused by the Jahn-Teller distortion and Mn dissolution. Herein, a simple solid-state combustion process is used to successfully prepare the Mg 2+ -Al 3+ co-doped LiMn 2 O 4 with truncated octahedral morphology. The Jahn-Teller distortion is inhibited by the stable Mn-O framework and the decreased lattice constant, which in turn lowers the dissolution of Mn. Moreover, Mg 2+ -Al 3+ co-doped LiMn 2 O 4 have lower activation energy and greater Li + diffusion coefficient. As a result, the optimized LiMg 0.03 Al 0.10 Mn 1.87 O 4 delivers satisfied initial capacity of 102.1 mAh‧g −1 with a capacity retention of 76.2 % after 1000 cycles at 10 C. Even at the ultra-high rate of 15 C and 20 C, Mg 2+ -Al 3+ co-doped sample also remain desired structure stability and cycling performance, which remains 73.8 % of its original capacity after 1000 cycles at 20 C. This work provides a reference for developing high-performance and stability cathode materials for lithium-ion battery.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2024
·
IF 5.2
Mingzhu Ni,Qiuying Xia,Jiaxin Liu,Xiaohui Zhu,Hui Xia
Spinel LiMn2O4 cathode possesses open three-dimensional ion transport channels, high safety, and abundant resources, making it a promising candidate for high-power lithium-ion batteries. However, spinel LiMn2O4 inevitably faces serious challenges of manganese dissolution and irreversible phase transitions during the electrochemical process, leading to rapid capacity decay and limiting its rate performance. Herein, we report a simple two-step solid-state sintering method to realize Li+ and PO43– codoping synergy in spinel LiMn2O4. It is found that PO43– doping not only expands the lattice parameters of the material, enhancing its charge-transfer kinetics but also increases the relative content of active Mn3+, improving the specific capacity of spinel LiMn2O4. Meanwhile, Li+ doping effectively enhances the stability of the spinel structure, and the irreversible phase transition from cubic phase to tetragonal phase could be effectively suppressed in spinel LiMn2O4. Consequently, benefiting from the synergistic effect of Li+ and PO43– codoping, the optimally codoped spinel LiMn2O4 electrode delivers high specific discharge capacities of 116 and 102 mA h g–1 at 1 and 20C, respectively, and achieves 78.1% capacity retention after 1000 cycles at 5C. This strategy provides an effective modification approach to developing advanced electrode materials for lithium-ion batteries.
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 Materials Chemistry A
·
2019
·Vol. 7
·期 36
·20878-20890
·
IF 10.733
Aolei Gao,Xinjuan Hou,Zhenhua Sun,Shaopeng Li,Huiquan Li,Jianbo Zhang
Spinel-type lithium manganese oxides (LMOs) are the most promising lithium-adsorption materials. LMOs can be in the form of solid solutions of LiMn2O4, Li1.33Mn1.67O4, and Li1.6Mn1.6O4. However, uncertainty about the lithium-desorption mechanism restricts material development. The synthesis of intermediate products of spinel-type LMOs during acid treatment is important to investigate such a mechanism. In this work, precisely controlled acid treatment experiments were performed to successfully obtain the intermediate products of LiMn2O4, Li1.33Mn1.67O4, and Li1.6Mn1.6O4. For LiMn2O4, lithium was desorbed with the dissolution of manganese. For Li1.33Mn1.67O4 and Li1.6Mn1.6O4, the lithium-desorption mechanism was an ion-exchange reaction, where lithium ions (Li+) in the 8a sites were prioritized for the ion-exchange reaction compared with Li+ in the 16d sites. Density functional theory (DFT) calculation results confirmed the experimental results and explained that the prioritization of Li+ in the 8a sites arose from its lower reaction-energy barrier, thereby revealing that Li+ preferred to move to the nearest vacant 8a sites when lithium was desorbed because of the lower diffusion-energy barrier. This work is the first to clarify the lithium-desorption mechanism through experiments and DFT calculations, and thus lays a foundation for the further exploitation of LMOs.
研究领域:
材料科学
·
电化学
·
计算化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）