Journal of Energy Storage
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2024
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IF 8.9
Kaixuan Li,Xiaole Yao,Zhicheng Li,Tongtong Gao,Weijun Zhang,Zhirong Liao,Xing Ju,Chao Xu
For battery thermal management , the phase change material (PCM) has demonstrated its advantages as a thermal buffer. In this paper, we proposed a novel thermal regulator that intelligently utilizes the volume changes to modulate heat transfer. The thermal regulator establishes a passive and negative feedback mechanism between the PCM and the cooling system, enabling a consistent and optimal operating battery temperature. This innovation negates the need for sensors or external logic devices, using a resilient valve passively adjusted by PCM volume changes. This in turn modulates coolant flow rate and battery temperature. Its thermal management performance is compared to other configurations like natural cooling, pure PCM, and composite PCM (cPCM). Extended dynamic tests are conducted at different ambient temperatures ( T amb ) for evaluation. The results indicate that batteries without thermal regulators fail to operate when T amb exceeds 30 °C. At T amb = 35 °C, the thermal regulator with cPCM exhibits repeated switching and effectively keeps the battery temperature lower than 38.13 °C. At T amb > 40 °C, both thermal regulators active to achieve faster heat dissipation. At 45 °C, the thermal regulator with cPCM successfully reduces the battery temperature to 35.02 °C. Integrating AlN in pure PCM lowers the battery module's peak temperature by 7.94 %. The thermal regulator also diminishes cyclic temperature variances, underlining its potential for enhancing battery thermal management .
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ACS Applied Energy Materials
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2024
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IF 5.4
Xuekai Zhu,Fangmin Ye,Fuliang Xu,Yongming Jiang,Shuling Fan,Meinan Liu
Lithium (Li) metal anodes (LMA) are regarded as one of the most promising anode candidates due to their high theoretical capacity; however, Li dendrites and the volume expansion issues make their practical application very challenging. Herein, a lightweight and high nitrogen (N)-doped carbon fiber with grafted sphere-like carbon nanotubes (HN-SCNTgCFs) has been successfully fabricated as a Li platting matrix by a two-step strategy of surface engineering including solid resource assisted chemical vapor deposition (solid-CVD) and subsequent electrochemical conversion. Benefitting from this HN-SCNTgCF matrix with a fast Li+ conductor (Li3N), the HN-SCNTgCFs || Li system behaves completely stable, i.e., 900 cycles with a CE of ∼100%; the quasi-Li-anode-free HN-SCNTgCFs || LiFePO4 (LFP) cell delivers a long lifespan of 800 cycles; and the Li-HN-SCNTgCFs || LFP cell exhibits long cycling stability (1000 cycles) with a low capacity decay of 0.057 mA h g–1 per cycle. These excellent results suggest that surface engineering is a feasible strategy for constructing an effective Li matrix to stabilize LMA.
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ChemSusChem
·
2024
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IF 7.5
Yanan Dong,Ju Bai,Luqi Xiao,Shangqing Chen,Lu Bai,Huaigang Cheng,Linglong Shan,Junfeng Wang,Yi Nie
Graphical Polyethyleneimine (PEI)-templated ZIF-8 (PEI-ZIF-8) was synthesized and incorporated into the PEI aqueous solution, then interfacial polymerized with trimesoyl chloride (TMC) to obtain the PEI-ZIF-8 modified polyamide NF membrane. The optimal PEI-ZIF-8-TMC membrane exhibits a permeance of 9 L/h m 2 bar and a Mg 2+ /Li + separation factor (SF) of 19. MOFs-modified nanofiltration (NF) membranes have been gained a lot of attention due to their favorable permeability and ion separation performance. Nevertheless, the prevailing preparation techniques are afflicted by the incompatibility of MOFs with polymers and the facile loss of MOFs. In this work, polyethyleneimine (PEI)-templated ZIF-8 (PEI-ZIF-8) was synthesized and incorporated into the PEI aqueous solution, then interfacial polymerized with trimesoyl chloride (TMC) to obtain the PEI-ZIF-8 modified polyamide NF membrane. This PEI modified strategy could endow the ZIF-8 nanoparticles with positively charged properties to avoid the aggregation and increase the interfacial compatibility with the polyamide. Meanwhile, the appropriate pore size of ZIF-8 (3.4 Å), which is between the hydration sheath surrounding of Li + (2 Å) and Mg 2+ (4.2 Å) impart the membrane with precise Mg 2+ /Li + separation ability. The optimal PEI-ZIF-8-TMC membrane exhibits a permeance of 9 L/h m 2 bar and a Mg 2+ /Li + separation factor (SF) of 19, both of which surpass the performance of the pure PEI-TMC membrane, which has a permeance of 4 L/h m 2 bar and a Mg 2+ /Li + separation factor of 11. Meanwhile, the membrane exhibited excellent long-term stability of 85 h. This novel approach to preparing MOFs-modified NF membrane represents a promising avenue for the separation of lithium and magnesium.
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高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-11
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IF 14.7
Fang Cheng-Dong,Huang Ying,Sun Yi-Fan,Sun Peng-Fei,Li Ke,Yao Shu-Yang,Zhang Min-Yi,Fang Wei-Hui,Chen Jia-Jia
Understanding the Li-ions conduction network and transport dynamics in polymer electrolyte is crucial for developing reliable all-solid-state batteries. In this work, advanced nano- X-ray computed tomography combined with Raman spectroscopy and solid state nuclear magnetic resonance are used to multi-scale qualitatively and quantitatively reveal ion conduction network of poly(ethylene) oxide (PEO)-based electrolyte (from atomic, nano to macroscopic level). With the clear mapping of the microstructural heterogeneities of the polymer segments, aluminium-oxo molecular clusters (AlOC) are used to reconstruct a high-efficient conducting network with high available Li-ions (76.7%) and continuous amorphous domains via the strong supramolecular interactions. Such superionic PEO conductor (PEO-LiTFSI-AlOC) exhibites a molten-like Li-ion conduction behaviour among the whole temperature range and delivers an ionic conductivity of 1.87 × 10 −4 S cm −1 at 35 °Ϲ. This further endows Li electrochemical plating/stripping stability under 50 μA cm −2 and 50 μAh cm −2 over 2000 h. The as-built Li|PEO-LiTFSI-AlOC|LiFePO 4 full batteries show a high rate performance and a capacity retention more than 90% over 200 cycling at 250 μA cm −2 , even enabling a high-loading LiFePO 4 cathode of 16.8 mg cm −2 with a specific capacity of 150 mAh g −1 at 50 °Ϲ.
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2024
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IF 3.7
Xiaoming Zhang,Wen Xie,Xiaolei Zhou,Wenjie Zhang,Jiawei Wen,Xin Wang,Guoyong Huang,Shengming Xu
A green environmental protection and enhanced leaching process was proposed to recover all elements from spent lithium iron phosphate (LiFePO 4 ) lithium batteries. In order to reduce the influence of Al impurity in the recovery process, NaOH was used to remove impurity. After impurity removal, the spent LiFePO 4 cathode material was used as raw material under the H 2 SO 4 system, and the pressure oxidation leaching process was adopted to achieve the preferential leaching of lithium. The E-pH diagram of the Fe-P-Al-H 2 O system can determine the stable region of each element in the recovery process of spent LiFePO 4 Li-batteries. Under the optimal conditions (500 r·min –1 , 15 h, 363.15 K, 0.4 MPa, the liquid-solid ratio was 4:1 ml·g –1 and the acid-material ratio was 0.29), the leaching rate of Li was 99.24%, Fe, Al and Ti were 0.10%, 2.07% and 0.03%, respectively. The Fe and P were precipitated and recovered as FePO 4 ∙2H 2 O. The kinetic analysis shows that the process of high-pressure acid leaching of spent LiFePO 4 materials depends on the surface chemical reaction. Through the life cycle assessment (LCA) of the spent LiFePO 4 whole recovery process, eight midpoint impact categories were selected to assess the impact of recovery process. The results can provide basic environmental information on production process for recycling industry.
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Materials Today Chemistry
·
2024
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IF 6.7
Xiangfeng Sun,Xuan Song,Dongxia Li,Yuxin Xue,Yulin Fu,Yuanhao Shi,Zhiqi Li,Chongxian Luo,Qiong Lin,Xuefeng Gui,Jiwen Hu,Kai Xu
Lithium-sulfur batteries (LSBs) have been considered as ideal candidates for next-generation energy storage equipment. However, its development has been hindered by the shuttle effect exhibited by the intermediate lithium polysulfides (LiPSs). To address this problem, covalent organic frameworks (COFs) show great promises as sulfur hosts for LSBs. We devised and synthesized a covalent organic framework (TPAS–TPB–COF) that is rich in redox sites by solution polymerization. The reactive groups in the covalent organic framework nano–channels not only inhibit the shuttling of polysulfides, but also promote the migration of Li ions. Meanwhile, the abundant cavities as well as redox sites in the COF nano–channels achieve a high sulfur loading capacity (∼71 wt%), a strong LiPS adsorption capacity, and facilitate ion diffusion. Based on these advantages, when it is used as a sulfur host for LSBs, our COF system provides a high capacity of 1134 mAh g −1 at 0.2 C (1 C = 1675 mA g −1 ), an outstanding rate capability (560 mAh g −1 at 4 C), and excellent stability.
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LANGMUIR
·
2025
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IF 3.9
Qingji Wang,Yilin Wang,Dan Wang,Xueying Yang,Ying Tang,Mingna Feng,Mingxia Wang,Xuemin Li,Feng Yan
Nanofiltration (NF) stands as a pivotal method for lithium resource recovery. Nonetheless, traditional NF membranes predominantly rely on size exclusion and the Donnan effect, necessitating elevated operating pressures and encountering substantial hurdles in terms of ion selectivity for lithium ions. Inspired by the host–guest recognition of crown ethers toward alkali metal ions, we prepared a crown ether-functionalized loose NF membrane (CE-LNF) via interfacial polymerization of diamino-dibenzo-14-crown-4 (DAB14C4) and trimesoyl chloride on a chloromethylated polysulfone substrate. The preparation conditions of the CE-LNF membranes were systematically optimized. Results revealed that the polyamide (PA) layer structure could be precisely tuned by changing the solvent and concentration of DAB14C4. The diffusion dialysis process with low energy consumption was applied in the Mg2+/Li+ separation experiment. Interestingly, the CE-LNF membrane achieved a unique “Li+ repulsion-Mg2+ permeation” result owing to the efficient host–guest recognition of Li+ by DAB14C4 on the PA layer. During the diffusion process, the transmembrane flux of Mg2+ (0.5 mol·m–2·h–1) surpassed that of Li+ (0.01 mol·m–2·h–1) by 50-fold, leading to a significant reduction in the Mg2+/Li+ ratio in the feed (from 19.5:1 to 5.2:1) and generating a Mg2+-enriched permeate. This work proposes a novel strategy for Mg2+/Li+ separation, where CE-LNF-based continuous diffusion dialysis serves as an energy-efficient, nonpressure-driven pretreatment for high Mg2+/Li+ ratio brines. The process not only produces high-purity Mg2+ solutions but also facilitates subsequent Li+ recovery via secondary CE-LNF diffusion or conventional extraction methods.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Tiansheng Gao,Yuqian Yang,Wenzhong Ma,Xiaoyi Zhang,Haicun Yang,Qiuyan Bi,Jing Zhong,Hideto Matsuyama
Positively charged nanofiltration membranes effectively extract lithium resources from brine due to their excellent ion selectivity. However, current positively charged nanofiltration membranes generally suffer from low permeation flux and poor lithium ion transport efficiency. To address these issues, constructing nanoscale channels with precise ion sieving capability within nanofiltration membranes has become a recent research focus. In this study, a novel nanochannel material—quaternized γ-cyclodextrin (Q-γ-CD)—was synthesized. Q-γ-CD contains positively charged quaternary ammonium groups on its surface, which can enhance the positive charge density of the membrane surface, thereby improving the rejection of divalent cations (such as Mg 2+ ). Meanwhile, the cavity size and hydrophobic inner cavity of Q-γ-CD provide rapid transport pathways for lithium ions and water molecules. By introducing Q-γ-CD into an aqueous solution containing polyethyleneimine (PEI) and using trimesoyl chloride (TMC) as the organic-phase monomer, a high-performance PEI/Q-γ-CD/TMC nanofiltration membrane was fabricated. Under optimal formulation conditions, the fabricated nanofiltration membrane exhibited a thin separation layer (≤100 nm), a pore size of approximately 0.45 nm, and a high surface charge (isoelectric point, ≥ 9). Thanks to the precise ion-sieving nanochannels provided by Q-γ-CD, the membrane’s pure water flux increased to 13.34 L·m −2 ·h −1 ·bar −1 , while the rejection of magnesium ions reached 97.8 %, and the Li + /Mg 2+ separation factor achieved a value of 18.5. This study presents a novel design strategy for positively charged nanofiltration membranes, offering theoretical support and practical guidance for achieving efficient magnesium-lithium separation.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Shenghao Zhang,Yun Chen,Lingjie Huang,Mengyu Liu,Qingliang Lv,Zexing Wu,Jianping Lai,Yuanxiang Gu,Lei Wang,Caixia Li
Sluggish Li + ion transference kinetics and high flammability strictly hinder the practical application of lithium batteries based on solid-state polymer electrolytes (SPEs). Herein, guided by theoretical calculation, a modified organic flame retardant synthesized by blending diphenyl phosphoryl chloride and resveratrol is designed, named as DPPR and displays superior compatibility with polyethylene oxide (PEO) by hydrogen bonds. Thus, the as-constructed versatile electrolyte system (P-DPPR) can improve mechanical, flame-retardant, and migration kinetics properties of PEO simultaneously. With P-DPPR electrolyte, the Li//Li cell operates 1000 h at 0.1 cm −1 , DPPR can greatly decrease activation energy from 0.31 eV to 0.16, Li + transference number of DPPR is 0.76, the LiFePO 4 //Li cell can work from −10 to 60 °C and achieves high-capacity retention rate of 97.2 % after 100 cycles at 25 °C. As revealed by in-situ tests and simulation, the fast ion conductivity can be ascribed to the synergistic effect from promoted dissociation of LiTFSI by π-π interaction, and the accelerated delivery by P O sites in P-DPPR. This work fabricates a composite SPE with high stability, fast kinetics, and safety capabilities, offering a novel perspective for the design of intrinsically safe batteries.
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Journal of Energy Storage
·
2025
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IF 9.8
Yu Cao,Chao Ma,Qingxu Zhang,Xixi Shi,Gang Liu,Xizheng Liu
Silicon-based anodes are the most promising candidates for advanced Li ion batteries (LIBs) with energy density over 400 Whkg −1 due to its high theoretical specific capacity. However, their scale applications are still restricted by the performance fading due to particle pulverization, electrode fracture as well as high production cost. Herein, we report a hierarchical porous structured SiO x (HP-SiO x ) prepared by a facile method of etching porous diatomite. It is primarily composed of crystalline silicon and amorphous silicon oxide. The optimized porous HP-SiO x demonstrates a hierarchical pore structure with 20-80 nm pores on the wall of macropores. The macropores could well accommodate the volume expansion during deeply lithiation, while the interconnected pores promote electrolyte permeation. Evaluated as anode in LIBs, it displays a discharge capacity of 668.5 mAhg −1 after 100 cycles, it gives a discharge capacity of 330mAh/g even at a higher current density of 500 mAhg −1 . The thickness of cycled HP-SiOx anode only expands by 60 % after 10 cycles, while other reported SiO anodes normally expand over 110 %. Moreover, the ionic conductivity of HP-SiO x anodes range from 7.24 × 10−9 cm 2 /s to 3.87 × 10−11 cm 2 /s. These improvement in electrochemical performance can be attributed to the fabrication of a hierarchical porous structure, which buffers the volume expansion during lithiation and facilitates ionic transportation within the electrode. The abundant resource of diatomite endows the large-scale, low-cost production of this hierarchical porous SiO x and underscore the potential for commercial applications in lithium-ion batteries.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Tinghui An,Nan Wang,Jiaqi Li,Yuhao Wang,Zongxuan Bai,Dong Xiang,Kedi Cai
Cu-based electrocatalysts possesses superior potential to produce energy-dense fuels and value-added chemicals in electrocatalytic CO 2 reduction reaction (eCO 2 RR). Nevertheless, the desperately desired target C 2 selectivity is fundamentally constrained by inevitable hydrogen evolution reaction (HER), C 1 products competition and sluggish reaction kinetics, especially for ethanol. Herein, the strategy of introducing Mg on CuO is proposed to aim at modulating adsorption energetics of oxygen-associated active species, which can effectively suppress competing pathways while boosting ethanol production. Benefitting from the modified electronic structure and lattice compressive strain induced by Mg-doping, Mg 0.34 @CuO exhibited 77.5 % of C 2 FE with remarkable stability, in which FE C2H5OH could reach 48.5 % with total current density of 245.5 mA cm −2 . Density functional theory (DFT) calculation revealed that Mg-doped Cu surface exhibits multiple catalytic function, such as suppressed HER, increased surface CO coverage and accelerated H 2 O dissociation, which can be conducive to promote ethanol production. Incorporation of Mg significantly reduces the energy barrier for asymmetric CO-CHO coupling reaction and stabilizes C-O bond in *CH 2 CHO intermediate (shared by ethylene (C 2 H 4 ) and ethanol (C 2 H 5 OH)) by enhancing d-p orbital coupling, thus prioritizing C 2 H 5 OH pathway. Furthermore, it could achieve a high discharge capacity of 14944 mAh g −1 and stable charge-discharge operation of 153 cycles in Li-CO 2 batteries that utilize Mg 0.34 @CuO as cathode material. This work demonstrates a generalizable approach to regulate eCO 2 RR activity and selectivity, and meanwhile shows great application potential in rechargeable Li-CO 2 batteries.
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Nano Materials Science
·
2025
·
IF 17.9
Yang He,Qingling Ruan,Han Kang,Ling Ye,Ya-Xiong Wang,Tiefeng Liu,Hairong Cheng,Xingxing Gu
Li-S batteries (LSBs), with their exceptional theoretical energy density, are widely recognized as a leading option for future energy storage solutions. Nevertheless, on the way to commercialization, the poor conductivity of the positive electrode, the easy dissolution loss of the active substance, and the serious dendrite growth of the negative electrode are stumbling blocks. Therefore, this work designs a novel tungsten and nitrogen-co-doped nanoporous carbon (W,N-C) with multifunction: chemically adsorbs the polysulfides to inhibit shuttling behavior, accelerates Li + transfer, and catalyzes polysulfides redox to address the aforementioned issues of LSBs. As expected at the beginning of the design, the prepared W,N-C-5/S composites cathodes demonstrate excellent performances, i.e., delivering an initial capacity of 944.9 mAh g −1 and a reversible capacity of 771.7 mAh g −1 after 500 cycles at 1 C, significantly outperforming the N-C/S contrast sample. The proposed method offers a feasible solution for boosting the electrochemical performance of LSBs.
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