JOURNAL OF POWER SOURCES
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2013
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IF 4.675
Lu Yue,Lingzhi Zhang,Haoxiang Zhong
Carboxymethyl chitosan (C-chitosan) is investigated as a new water soluble binder for Si anode of Li-ion batteries. The Fourier transformation infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) measurements reveal that the strong hydrogen bonding is formed between the hydroxylated Si surface and the polar groups (–OH, –COOH and –NH 2 ) of C-chitosan. The Si/C-chitosan anode (Si:carbon black:C-chitosan = 62:30:8 in weight ratio) exhibits a high first discharge capacity (4270 mAh g −1 ) with a first coulombic efficiency of 89%, and maintains a capacity of 950 mAh g −1 at the current density of 500 mA g −1 over 50 cycles.
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高影响因子
ACS Sustainable Chemistry & Engineering
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2024
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IF 7.1
Zejia Wu,Jiashu Yuan,Hui Wang,Zaifa Pan,Jie Gao,Yonggao Xia
With the wide application of ternary lithium-ion batteries, the increased usage of batteries has resulted in a corresponding rise in the amount of discarded batteries. Here, we propose an efficient and prioritized lithium extraction process with a low environmental impact for the recovery of valuable metal components from spent LiNi0.5Co0.2Mn0.3O2 cathode materials. SO2 calcination–water leaching was used to recover Li, while H2SO4 acid leaching facilitated the recovery of Ni, Co, and Mn, yielding a precursor solution for the treatment of discarded NCM batteries. The effects of calcination temperature, calcination time, water leaching time, water leaching liquid–solid ratio, different battery ratios, acid leaching time, acid leaching liquid–solid ratio, and acid leaching temperature were optimized. The acid leaching process was controlled by surface chemical reactions through kinetic analysis. Under optimal conditions, Li was converted to soluble Li2SO4, achieving an impressive leaching rate of 99.7%. Ni, CO, and Mn were converted to their respective oxides. Furthermore, it was demonstrated that the formation of Li2Mn(SO4)2 from Mn with Li during calcination enhances the leaching efficiency across different battery composition ratios. The activation energies of Ni, Co, and Mn during the acid leaching process were determined by kinetic calculations, yielding values of 130.19, 133.05, and 134.09 kJ mol–1, respectively. This study provides a novel method for recycling spent NCM cathode materials.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Jingjun Wang,Hao Zhang,Rukang Tian,Huiyan Shen,Wei-Hua Li,Yunkun Wang
The increasing demand for lithium resources in the rapidly growing new energy industry has spurred interest in efficient lithium extraction from salt-lakes using Nanofiltration membranes, owing to their impressive ionic rejection capabilities. However, achieving effective Mg 2+ /Li + selective separation remains a critical challenge for the widespread application of NF membranes in lithium extraction. This study focuses on the utilization of poly(dimethyldiallylammonium chloride)-modified polyethersulfone substrate for interfacial polymerization modulation in the preparation of polyamide nanofiltration membrane. The prepared membrane exhibited high MgCl 2 rejection. And then the prepared membrane was subsequently optimized by post-modification with piperazine. Previous and subsequent modifications resulted in smaller pores, narrower pore size distribution, and lower surface negativity of the modified membrane. These properties contributed to the significantly higher MgCl 2 rejection rate of the modified membrane (94.7%) than that of the Control membrane (46.1%). This excellent rejection property ensured the efficient Mg 2+ /Li + separation performance of the modified membrane. It was noteworthy that the Mg 2+ /Li + separation factor for lithium extraction in simulated brine reached an impressive 77.2. In addition, the modified membrane retained a comparable pure water permeance and Na 2 SO 4 rejection rate as the control membrane and showed excellent stability, significantly improving the Mg 2+ /Li + separation efficiency while reducing energy consumption. This study presents a simple strategy to fabricate NF membranes with excellent Mg 2+ /Li + separation factor.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Yanan Wei,Qian Zhang,Yuan Han,Xinyu Xu,Wenmeihui Zhao,Ying Hu,Rongmei Liu,Guixiang Qian,Zhongliang Tian,Chao Yang
In China, 80 % of lithium resources are in the salt lakes of the Tibetan Plateau, although the Mg 2+ /Li + ratios in them are too high, limiting the development of China’s lithium extraction industry from the salt lakes. This study investigates the potential of the LiMn 2 O 4 -Zn cell system for lithium extraction from brines with high Mg 2+ /Li + ratios. The system demonstrates excellent selectivity for Li + and efficiently extracts Li + even in brines with Mg 2+ /Li + ratios as high as 100:1 (wt%). The system operates stably at various brine concentrations, particularly in high-salinity environments. The study also investigates the kinetic performance of the LMO-Zn system, revealing optimal performance at high Li + concentrations and moderate current densities. The LiMn 2 O 4 -Zn cell system presents a promising approach for lithium extraction from brines, offering high selectivity, reversibility, and adaptability.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Hangyu Li,Yang Gu,Xiaoyuan Zeng,Kai Ding,Haotian Tan,Peng Dong,Yanjia Zhang,Jie Xiao
Due to the high theoretical energy density, lithium-carbon dioxide (Li-CO 2 ) batteries provide unique advantages when using CO 2 to generate electricity. However, the issues with lithium dendrite generated by uneven deposition and quick cathode passivation continue to impede the development of Li-CO 2 batteries. In this work, a Janus separator with dual functionalities is created using an in-situ growth and hydrothermal technique. It can be used to expand the cathode to alleviate the quick passivation of the cathode, in addition to inhibiting the growth of lithium dendrite. On the one hand, as an ion transport framework, Prussian blue (PB) nanocubes formed in-situ on the anode side can control the uniform transport of Li-ions and prevent the proliferation of lithium dendrites. The Prussian blue and reduced graphene oxide composite material (PB-rGO) on the cathode side, on the other hand, can be employed as an extension of the cathode, which not only contains more discharge products but also encourages their decomposition, playing a self-cleaning role. Moreover, the Li||Li symmetrical battery with Janus separator exhibits a steady cycle life of more than 1700 h. Also, when applied to a Li-CO 2 battery, it demonstrates an extremely high discharge capacity of 12100 mAh g −1 and an exceptionally long cycle life of 3144 h.
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PubMed
高影响因子
DESALINATION
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2025
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IF 9.8
Jiyue Wang,Yang Xu,Qi Zhang,Qiang Zhao,Zhitian Liu
Surface modification is an effective strategy to improve separation performance of Mg 2+ /Li + nanofiltration membranes, but less is known about how chemical structures of modification molecules affect separation performances of resultant membranes. In this work, three types of quaternary ammonium salts with modulated structures were designed to modify polyethyleneimine-trimesoyl chloride (PEI-TMC) membranes. The surface and cross-section morphologies, mean pore sizes, charge and hydrophilicity properties of the modified membranes were characterized. These quaternary ammonium salts can tune membrane properties effectively, and impart good separation performance to modified membranes. Molecular structures of quaternary ammonium salts affect the diffusion of the monomer into the organic phase and the reactivity with the acyl chloride. The flux of modified membranes are 99.6 Lm −2 h −1 , 112.2 Lm −2 h −1 , and 128.8 Lm −2 h −1 , and the rejection of MgCl 2 are 93.2 %, 94.9 %, and 92.8 %, respectively. The modified membranes also show good retention for heavy metal ions (e.g., Cu 2+ , Cr 3+ , Zn 2+ , Co 2+ , and Ni 2+ ).
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高影响因子
RARE METALS
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2025
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IF 11
Hou Yao-Lin,Zhang Yu-Qing,Li Dan,Xie Hai-Ming,Liu Jia,Liu Yu-Long,Zhu Jie-Fang
Developing effective heterostructure strategies to mitigate the shuttling effect and accelerate lithium polysulfide (LiPS) conversion remains a critical challenge in lithium–sulfur (Li–S) batteries. Here, we report the first carbon–free VO 2 –VS 2 heterostructure material synthesized via in situ sulfurization, applied as a modifier on a commercial polypropylene (PP) separator (denoted as VO 2 –VS 2 @PP). The as–prepared VO 2 –VS 2 nanorods synergistically combine the high absorptivity of VO 2 with the efficient catalytic properties of VS 2 , simultaneously enhancing LiPS anchoring and promoting its conversion. We systematically investigate the influence of material composition on battery performance, leveraging these functional attributes, Li–S cells incorporating VO 2 –VS 2 @PP exhibit exceptional cycle stability (over 500 cycles at 1C), impressive rate performance (807 mAh·g –1 at 5C), desirable reversibility (49.9% capacity retention after 300 cycles at 5C) and exceptional pouch cell performance (3.65 mAh·cm –2 after 50 stable cycles at 0.1C). This study underscores the potential of tailored heterostructures in realizing high–performance Li–S batteries, offering new insights for next–generation energy storage solutions. Graphical abstract
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高影响因子
JOURNAL OF POWER SOURCES
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2024
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IF 8.1
Yajun Zhao,Ke Meng,Teng Luo,Mengxu Chen,Shuai Niu,Cong Lin,Xianjun Xing,QinChun Yang,Xianghua Kong,Dawei Zhang,Hao Luo
The significant challenge faced by Li–O 2 batteries (LOBs) lies in their slow oxygen reduction and evolution kinetics, which greatly necessitates the development of highly active catalysts. Herein, we report a high-performance oxygen cathode (RuCo-NC) that is achieved by uniformly dispersing the nanoalloy of noble metal Ru and transition metal Co on the three-dimensional (3D) nanoporous carbon. Density functional theory (DFT) calculations reveal a prominent electron transfer process between Ru and Co, along with a substantial abundance of electron transfer sites on RuCo-NC. These characteristics contribute to a strong positive equilibrium effect on the formation and decomposition of Li 2 O 2 , which is crucial for LOBs. Furthermore, the calculated Gibbs free energy change during the oxygen reduction and evolution processes indicates that RuCo-NC exhibits the smallest overpotential compared to single metal catalysts . As a result, this RuCo-NC cathode enables the resulting LOB with a larger discharge specific capacity, lower overpotential for efficient oxygen reduction and evolution, and excellent cycling stability. This work introduces an effective method for fabricating nanoalloy catalysts with enhanced efficiency, promising advancements in energy applications .
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高影响因子
Journal of Energy Storage
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2024
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IF 8.9
Fudong Jia,Ranshuo Zhang,Fangfang Wang,Chunxiao Jiao,Chao Gao,Jingjing Sang,Yanpei Xu,Qi Wang
With the increasing prevalence of mobile electronic devices, electric vehicles, and other technological advancements, there is a growing demand for higher-capacity Lithium-ion batteries (LIBs). Metal-organic frameworks (MOFs) have been actively researched in recent years due to their numerous advantages. However, the irreversible collapse during lithium-ion interaction hampers MOFs’ electrochemical stability. This study employs a direct precipitation method to synthesize uniformly shaped MOF materials, followed by carbon coating using electrospinning techniques , and ultimately, derivatives of MOF materials are produced through annealing. Thanks to this innovative material design process , exceptional performance is observed in this material as a lithium-negative electrode. After 1000 cycles at a high current density of 1 A g −1 , its reversible capacity stabilizes at 1318 mAh g −1 . Moreover, this negative electrode material exhibits exceptional rate performance at various current densities. The Co 3 O 4 /NiO@NCNFs electrode demonstrates enhanced charge storage capacity due to the synergistic effects of diffusion and capacitance control processes. Additionally, this material exhibits characteristics of low impedance and high lithium-ion diffusion rate. This study presents a novel method for manufacturing lithium-ion battery negative electrode materials by integrating MOF materials with electrospinning technology.
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高影响因子
Journal of Energy Storage
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2024
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IF 8.9
Qingyang Mei,Yutong Zhai,Feilong Dong,Yanju Gou,Haiming Xie,Yulong Liu
Soft-matter electrolytes have garnered significant attention due to their improved safety features, rendering them viable options for the creation of Li metal batteries with high energy densities. However, establishing effective interfacial contact between the electrodes and soft-matter electrolyte remains a significant challenge, necessitating modifications at the interface. In this study, we design an artificial composite electrolyte interphase (PEG-Cs SEI) on the surface of the Li metal anode to improve ion transport between the soft-matter electrolyte and Li metal. The PEG-Cs SEI layer exhibits high flexibility and mechanical strength, effectively mitigating the lithium dendrite growth and volume expansion. As a result, Li||Li cells assembled with PEG-Cs SEI-modified lithium metal anodes exhibit stable performance for more than 1700 h, maintaining small overpotential even at high current densities and capacities (2.45 mAh cm −2 ). With a LiNi 0.6 Co 0.2 Mn 0.2 O 2 (NCM622) cathode, the battery shows a capacity up to 182 mAh g −1 at first discharge with cut-off voltage of 4.5 V. Furthermore, in a pouch cell configuration, the battery achieves 100 % capacity retention over 90 cycles and successfully passes safety tests, without fire or smoke. Combining the modified lithium metal anode with soft-matter electrolytes paves a promising way for the effective implementation of high-energy-density Li metal cells.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Wenyu Shen,Duo Wang,Yuhe Tian,Fang Zhou,Yanyu Lin,Ziyun Zhang,Junbo Xu,Chao Yang
Polymer inclusion membrane (PIM) has become a potential alternative in efficient Li + separation from brines typically with Mg 2+ and Li + , due to its exceptional stability and selectivity. However, the practical application of PIMs is still greatly restricted by its slow mass transfer and related unclear transport mechanism. Here, we fabricated an efficient PIM with tributyl phosphate (TBP) along with sodium tetraphenylborate (NaBPh 4 ) as carriers and cellulose triacetate (CTA) as a polymer skeleton for highly selective and permeable Li + separation from high Mg 2+ /Li + aqueous solutions, offering an initial flux of 3–20 times higher than other PIMs. With increasing TBP content in the PIM, a nonmonotonical trend (sharp increase-leveling off-slow decrease) of its initial flux was observed. The improvement of the solubility (compatibility) of NaBPh 4 in CTA matrix by introducing TBP was demonstrated by scanning electron microscope (SEM) coupled with X-ray energy dispersive spectroscopy (EDS) images, which was highly consistent with binding energy simulation. X-ray diffraction (XRD) and positron annihilation lifetime spectroscopy (PALS) results verify that moderate TBP content in the PIM could enlarge the distance of polymer chains and enhance the initial flux of PIMs, while excessive TBP can occupy the free volume sites, leading to an adverse effect on the permeability. Our study provides valuable information on the compatibility effect on the mass transfer through the polymer matrix including PIMs, which exhibits prospect in a wide range of applications of metal separation.
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高影响因子
DESALINATION
·
2025
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IF 9.8
Yang Zhao,Tao Wu,Yanliang Wang,Zimo Feng,Lijuan Cheng,Yu Zheng,Hui Wang,Kai Xu,Runnan Zhang,Zhongyi Jiang
Increasing the positive charge density (PCD) of nanofiltration (NF) membranes is crucial to acquiring the high selectivity of Li + /Mg 2+ separation and remains extensive exploitation. Herein, a novel modifier (1-methyl hydrazide-3,5-dibenzyl trimethyl ammonium bromide, MDTAB) containing two quaternary ammonium groups and an amino group was designed and synthesized, which was grafted onto the polyamide NF membrane surface. The surface PCD of the MDTAB modified membrane (+7.02 mC m −2 ) was almost four times that of the unmodified membrane, which is the highest among the existing positively charged NF membranes. The MDTAB modified membrane acquired MgCl 2 rejection as high as 99.3 %, and the pure water permeance was 15.92 L·m −2 ·h −1 ·bar −1 . When utilized for Li + /Mg 2+ separation, the Mg 2+ /Li + mass ratio was reduced from the original 100 to 1.73. This strategy may provide valuable guidance for the rational design of the positively charged membrane in salt lake lithium extraction applications.
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高影响因子
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