CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Liqin Zhao,Xiaojie Zhang,Keyi Liu,Xin Liu,Yuefa Gong,Hong Peng,Wei Qi
Lithium/aluminum layered double hydroxides (LDH) have been industrially applied to extract lithium from salt-lake brine. Different from traditional granulation methods, chitosan with high hydrophilicity was used as the binder of LDH in this work, and LDH/chitosan composite hydrogel granules (CLDH) with a diameter of about 1–2 mm were successfully prepared. The new granulation method is simple, cost-effective, and does not require the use of organic solvents. The chemical composition and structure of CLDH were characterized by techniques such as FTIR, XRD, FESEM, TEM, TGA, and XPS. In simulated brine with a Mg 2+ /Li + ratio of 102, the maximum saturated adsorption capacity of lithium on CLDH-3 reached 12.5 mg g −1 (pH = 6.5), but it took 24 h to reach adsorption equilibrium. During the three successive cycles for the extraction of Li + from simulated brine by the CLDH-3 column at the flow rate of 1 mL min −1 , the adsorption capacities of Li + on CLDH-3 in the three cycles were 15.4, 15.9 and 12.1 mg g −1 , respectively. Moreover, deionized water (30 °C) was used as the eluent to recover lithium adsorbed on the CLDH-3 column, and the lithium recovery efficiencies reached 50.7 %, 53.6 %, and 62.8 % of the column adsorption capacities over the three cycles, respectively, and the Mg/Li ratios in the eluents were 0.47, 0.71, and 0.50, respectively. Overall, CLDH-3 exhibits good reusability, mechanical strength, structural stability, and selectivity in the process of lithium extraction from simulated salt-lake brine, and has potential industrial application value.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yaru Fan,Hongjing Tian,Kunpeng Wang,Guoli Zhou,Jingtao Wang,Guosheng Li,Yijun Cao,Yingwei Wang,Xiaobin Jiang,Weijie Kou
The demand for lithium resources is increasing globally. Salt lakes have been an important source of lithium exploitation. However, Mg 2+ /Li + separation is a challenge mainly for lithium extraction from salt lakes with high Mg 2+ /Li + ratio. In this paper, a novel monomer QTHEED with bis-quaternary ammonium was designed and synthesized. Composite nanofiltration membranes were also prepared by surface modification of polyamide membranes. The permeance (23.08 L m −2 h −1 MPa −1 ) and Li + /Mg 2+ selectivity (21.7) of modified membranes are both ∼3 times higher than those of the pristine membrane. Increased positive charge of membranes enhances the rejection of Mg 2+ . Furthermore, QTHEED modification brings hydrophilic groups, Turing structure, and larger membrane pores. Simulation results confirmed that the incorporation of the QTHEED enabled the membranes to effectively separate Mg 2+ and Li + and to be more conducive to the passage of water molecules. In addition, the nanofiltration performance of the modified membrane was stable after 40 h of continuous nanofiltration tests at 4 bar pressure. This study presented a novel and efficient approach for separating Mg 2+ and Li + in industrial settings.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Liyuan Li,Tao Li,Yifan Sha,Chi Zhang,Baozeng Ren,Lan Zhang,Suojiang Zhang
Silicon-based anode materials attract ever-increasing attention owing to their high theoretical capacity. However, their practical application is significantly hindered by the dramatic volume change during the charge/discharge process, during which not only the solid electrolyte interface (SEI) but also the electrode might be ruined. Here, we propose a H-bond network-regulated binder by introducing low-molecular-weight cross-linkers, lithium oxalate and α-cyclodextrin (α-CD), into alginate (Alg). The balance between the binding strength and Li ion diffusion is realized through the control of the ratio between them. Lithium oxalate and α-CD can effectively regulate the H-bond network of the binder by forming intermolecular dynamic H bonds with Alg and reducing the intramolecular ones. Although the hybrid binder shows lower adhesion force than Alg, better electrode integrity is obtained during the charge/discharge process. Meanwhile, Li+ transportation is facilitated due to extra Li+ supplied by lithium oxalate, thereby achieving better rate capability.
研究领域:
材料科学
·
电化学
·
能源存储
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Nano Energy
·
2020
·
IF 16.602
Huajin He,Fucheng Ren,Jianping Zhu,Yuxuan Xiang,Bizhu Zheng,Sheng Li,Shijian Chen,Yixiao Li,Qi-Hui Wu,Yong Yang
Li-SF 6 battery has been proposed as a novel energy conversion device for both reducing greenhouse-effect SF 6 and potentially providing large specific energy . However, the real discharge process of SF 6 remains ambiguous with fast cathode passivation and large polarization. Here we report that the Li-SF 6 chemistry is able to deliver an unprecedented capacity of >20,000 mA h g c −1 with reduced polarization and excellent rate capability by using a low-cost, high-surface-area porous carbon as cathode host. More importantly, by adjusting the SF 6 atmosphere, an approximately eight-electron transfer process with predominant products of LiF and Li 2 S is realized via two voltage steps, whereas previously only a little Li 2 S could be found with one plateau appearing. The eight-electron process leads to a high energy density about 2,300 W h kg −1 based on the mass of carbon and discharge products, which sheds light on SF 6 as a promising high-energy-density cathode.
研究领域:
能量转换
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电化学
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材料科学
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环境科学
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电源技术
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高影响因子
HYDROMETALLURGY
·
2026
·
IF 6.3
Yangxiang Huang,Mengyao Chen,Lixin Xue,Hangqing Xue,Juexin Wang,Fei Huang,Congjie Gao
To simultaneously increase the Mg 2+ /Li + separating performance under high Mg 2+ /Li + ratios of polyethylene/polyamide (PE/PA) thin film composite (TFC) nanofiltration (NF) membranes, 1,4,7,10-tetraazacyclododecane (Cyclen) was added in the aqueous phase with polyethyleneimine (PEI) monomer. During reverse interface polymerization (RIP) on polyethylene (PE) substrates, phthaloyl chloride (PC) was added to the organic phase with terephthaloyl chloride (TPC) monomer. It was found that the addition of Cyclen and/or PC could both increase the hydrophilicity, surface roughness and average pore sizes of formed virgin PE/PA TFC NF membranes, leading to increased water permeability. The Li + /Mg 2+ separating factor S Li/Mg first increased and then decreased with maximum points at the TPC/PC ratio of 5:1 and Cyclen addition level of 0.02 wt%. Cation absorption, especially Mg(II)-Cyclen interactions in the PA layers under higher Mg 2+ /Li + ratio led to increased surface Zeta potential, decreased average pore diameters μ p, and greatly increased Li + /Mg 2+ separating factor (S Li/Mg ). S Li/Mg value of PEI-TPC/PC 5:1 -Cyclen 0.02 membranes could be increased from 5.0 to 55.47, keeping the water permeability around 6.5 L m −2 h −1 bar −1 when Mg 2+ /Li + ratio increased from 1 to 100 in the brine.
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Carbon Energy
·
2022
·Vol. 5
·期 2
·e255
·
IF 21.556
Yunke Wang,Yige Zhao,Kangli Liu,Shaobin Wang,Neng Li,Guosheng Shao,Feng Wang,Peng Zhang
Sophisticated efficient electrocatalysts are essential to rectifying the shuttle effect and realizing the high performance of flexible lithium-sulfur batteries (LSBs). Phase transformation of MoSe 2 from the 2H phase to the 1T phase has been proven to be a significant method to improve the catalytic activity. However, precisely controllable phase engineering of MoSe 2 has rarely been reported. Herein, by in situ Li ions intercalation in MoSe 2 , a precisely controllable phase evolution from 2H-MoSe 2 to 1T-MoSe 2 was realized. More importantly, the definite functional relationship between cut-off voltage and phase structure was first identified for phase engineering through in situ observation and modulation methods. The sulfur host (CNFs/1T-MoSe 2 ) presents high charge density, strong polysulfides adsorption, and catalytic kinetics. Moreover, Li-S cells based on it display capacity retention of 875.3 mAh g −1 after 500 cycles at 1 C and an areal capacity of 8.71 mAh cm −2 even at a high sulfur loading of 8.47 mg cm −2 . Furthermore, the flexible pouch cell exhibiting decent performance will endow a promising potential in the wearable energy storage field. This study proposes an effective strategy to precisely control the phase structure of MoSe 2 , which may provide the reference to fabricate the highly efficient electrocatalysts for LSBs and other energy systems.
研究领域:
材料科学
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电化学
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储能技术
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纳米技术
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电池技术
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高影响因子
Journal of Energy Storage
·
2023
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IF 9.4
Hongying Hou,Meng Ye,Jian Lan,Xiaohua Yu,Ju Rong,Yanpeng Jia,Yixuan Wang,Xianxi Liu
The waste materials may result in the environment pollution and the rapid consumption of the non-renewable natural resources if they aren't reasonably recycled in time. LiMn x Fe 1-x PO 4 can combine the advantages of good rate capability of LiFePO 4 and high voltage of LiMnPO 4 , thus attracting more attentions. Herein, LiMn x Fe 1-x PO 4 /C (x = 0, 0.05, 0.1 and 0.2) powders are prepared from three wastes (spent Li foil, expired manganese gluconate and rust) by FePO 4 process. The results show that LiMn x Fe 1-x PO 4 /C (x = 0, 0.05, 0.1 and 0.2) powders appear as the irregular particles with 100–300 nm in size, and Mn 2+ partly substituted at Fe 2+ site. Especially, optimal 10 % Mn 2+ -doping improves the voltage plateau and energy density of LiFePO 4 /C. In detail, LiMn 0.1 Fe 0.9 PO 4 /C cathode delivers the specific discharge capacity of 159.3 mAh/g at 0.2C and 137.7 mAh/g at 1.0C, higher than those of LiFePO 4 /C cathode, LiMn 0.05 Fe 0.95 PO 4 /C cathode and LiMn 0.2 Fe 0.8 PO 4 /C cathode due to high diffusion coefficient (8.36 × 10 −14 cm 2 /s) and wider ionic diffusion channels of LiMn 0.1 Fe 0.9 PO 4 /C. The capacity retention rate of LiMn 0.1 Fe 0.9 PO 4 /C remains 91.0 % even after 500 cycles at 1.0C. Seemingly, optimal 10 % Mn 2+ -doping can indeed improve the reversible capacity and cyclic performance of LiFePO 4 cathode mainly due to lower charge transfer impedance and widen Li ion diffusion channel.
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ChemSusChem
·
2023
·
IF 8.4
Kangzhe Cao,Sitian Wang,Jiahui Ma,Xiaobing Xing,Xiaogang Liu,Yong Jiang,Yang Fan,Huiqiao Liu
Graphical MnNb 2 O 6 -C nanofibers (NFs) with MnNb 2 O 6 nanoparticles (~15 nm) confined in carbon NFs were prepared and evaluated as Li-ion battery anode. Microstructure reconstruction is verified in this kind of intercalation type anode material and that increases the pseudo-capacitance contributions, which is the main reason for the high-capacity achieved by the MnNb 2 O 6 -C NFs electrode. MnNb 2 O 6 anode has attracted much attention owing to its unique properties for holding Li ions. Unluckily, its application as a Li-ion battery anode is restricted by low capacity because of the inferior electronic conductivity and limited electron transfer. Previous studies suggest that structure and component optimization could improve its reversible capacity. This improvement is always companied by capacity increments, however, the reasons have rarely been identified. Herein, MnNb 2 O 6 -C nanofibers (NFs) with MnNb 2 O 6 nanoparticles (~15 nm) confined in carbon NFs, and the counterpart MnNb 2 O 6 NFs consisting of larger nanoparticles (40–100 nm) are prepared by electrospinning for clarifying this phenomenon. The electrochemical evaluations indicate that the capacity achieved by the MnNb 2 O 6 NF electrode presents an activation process and a degradation in subsequence. Meanwhile, the MnNb 2 O 6 -C NF electrode delivers high reversible capacity and ultra-stable cycling performance. Further analysis based on electrochemical behaviors and microstructure changes reveals that the partial structure rearrangement should be in charge of the capacity increment, mainly including pseudocapacitance increment. This work suggests that diminishing the dimensions of MnNb 2 O 6 nanoparticles and further confining them in a matrix could increase the pseudocapacitance-dominated capacity, providing a novel way to improve the reversible capacity of MnNb 2 O 6 and other intercalation reaction anodes.
研究领域:
材料科学
·
电化学
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Jiahao Huang,Huangyingzi Wang,Xuhua Li,Yubin Zhang,Wenxin Chen,Jiaping Wu,Lijun Meng,Manhong Huang
Nanofiltration (NF) is promising for the efficient Mg 2+ /Li + separation from salt-lake brines, which was expected to solve the insufficient supply of lithium resources. However, the conventional NF membranes fabricated by piperazine (PIP) and trimesoyl chloride (TMC) usually exhibit negative charge surface with low Mg 2+ /Li + selectivity. To improve the Mg 2+ /Li + separation, NF membranes with enhanced surface positive charge were fabricated by introducing polyaminopropylbiguanide (PAPB) into the polyamide (PA) active layer. Compared with the pristine membrane, the PAPB modified membrane exhibited both enhanced water flux from 7.50 to 10.50 L/m 2 h•bar and obviously improved MgCl 2 retention from 65.51 % to 96.52 %. High separation factor (S Li/Mg ) of 30.81 was obtained with the Mg 2+ /Li + mass ratios (MLR) of 50:1, attributing to the strong protonation capacity of guanidine groups in a wide pH range. Moreover, the PAPB modified membranes demonstrated a superior anti-fouling performance during NF test. This work presents a novel and facile strategy for the preparation of high-performance NF membranes and provides new insights into the underlying mechanism for the enhancement of Mg 2+ /Li + separation by enhancing positive charge and Donnan exclusion of NF membranes.
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Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2025
·
IF 4.6
Xianghui Ding,Yifan Zhang,Quan Pei,Yiting Tong,Jiafeng Zhai,Changxing Zhao,Yun Ou,Jing Chen,Shuhong Xie
PVDF has a relatively high polarity leading to better affinity with electrolyte, and its relatively high dielectric constant promotes the dissociation of lithium ions. Sepiolite has a unique fibrous morphology, forming a rich pore structure, which can enhance the specific surface area and thermal stability of separators. In this work, the PVDF/sepiolite composite separator is prepared by electrospinning technology. Benefiting from the high polarity and dielectric constant of PVDF and the special structure of sepiolite, the composite separator reveals excellent electrolyte adsorption and electrochemical performance. It shows a high ionic conductivity (3.04 × 10 -3 S·cm −1 ) and a high lithium-ion transference number ( t L i + = 0.781), With excellent rate capacity (110mAh g −1 even at 5C) and cycle performance (∼165mAh g −1 after 250 cycles at 0.5C with a capacity retention of 99 %). The thermal stability and electrochemical performance of the composite separator is enhanced by adding appropriate amount of sepiolite.
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Nano-Micro Letters
·
2026
·Vol. 18
·期 1
·257
·
IF 38.5
Zhou Yin,Yin Kun,Zhang Tian,Feng Dongyu,Li Jiapei,Zhu Anquan,Lin Dewu,Xue Pan,Liu Yu,Liu Yongyu,Liu Kai,Liu Kunlun,Luan Chuhao,Yang Huawei,Chen Hou,Yao Yagang,Hong Guo
PtFe catalyst was rationally designed based on frontier molecular orbital theory to investigate orbital-level interactions for enhanced oxygen evolution reaction activity in Li–O 2 batteries.
The d z 2 – d z 2 orbital coupling between Fe and Pt leads to electron donation from Fe to Pt, increasing electron population in the Pt d z 2 orbital.
Excess electrons from the Pt d z 2 orbital occupy antibonding states with LiO 2 , weakening interaction strength and boosting oxygen evolution reaction kinetics.
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DOI
PubMed
高影响因子
Nature Communications
·
2026
·
IF 18.1
Wang Kuiyou,Li Guanwu,Zhang Yunfeng,Xu Hechao,Zhao Bo,Wei Jianshuang,Kang Wenbin,Wang Dong,Song Lixian,Zheng Weitao,Song Yingze,Sun Jingyu
Li‒S batteries offer a transformative alternative to present energy storage technologies. However, their practical viability is impeded by polysulfide shuttling and lithium dendrite formation. Electrolyte engineering seeks to solve these thorny issues, yet conventional approaches rely on internal, static or invasive modifications. Here we report an acoustic-induced entropy-driven electrolyte design to steer Li‒S chemistry, realizing enhanced sulfur conversion kinetics and sustained lithium working interface. With the aid of comprehensive instrumental and computational toolbox, it is shown that the entropy-driven state of the electrolyte propels the homogeneous nucleation of both sulfur and lithium species, along with dictating Li-ion desolvation process. The designed electrolyte at a lean dosage of 2.9 µL mg –1 readily enables a 1.1 Ah-level pouch cell with a delivered specific energy of 404.1 Wh kg -1 without packaging. Our electrolyte formulation concept using external field modulation offers an appealing solution to overcome key hurdles in Li–S technology toward high-performance devices.
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PubMed
高影响因子
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