CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yuan Zeng,Yuanyuan Wang,Linyao Ke,Qiuhao Wu,Xiaojie Tian,Liangliang Fan,Kirk Cobb,Yuhuan Liu,Roger Ruan,Yunpu Wang
The pyrolysis of metal soaps to produce hydrocarbon rich fuel has been studied extensively. However, the combined effects of microwave radiation and metal ion types on hydrocarbon production have not been addressed. In this study, the microwave and conventional pyrolysis experiments were conducted on five metal soaps (Li soap, Na soap, K soap, Ca soap, Mg soap). The results demonstrated that the metal ions at the carboxyl end of the soap enhanced the polarity of the reactants, leading to a rapid increase in temperature under microwave conditions. With the ion radius increasing, the heating rate increased gradually. Compared with conventional pyrolysis, microwave pyrolysis exhibited a more rapid heating rate, a higher degree of carbon chain fracture, and a greater abundance of small olefin compounds, which promoted aromatization reaction and the release of CO, H 2 and CH 4 . In addition, the composition of the pyrolysis products derived from different metal soaps is affected by the characteristics of metal ions. As the radius of metal ions increased, the oxygen content in the liquid products decreased gradually, while the carbon content increased. The strengthening effect of microwave was further analyzed. With the increase in the radius of metal ions, the strengthening effect of microwaves on olefins formation was gradually weakened, while the inhibiting effect on alkanes formation was gradually enhanced. The structure of carboxylate network is affected by the radius of metal ions, which results in the regular change of the strengthening effect of microwave on olefins and other products. This study is highly significant in guiding the pyrolysis of soapstock waste to prepare olefins and alkanes with high efficiency and low energy consumption.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Xincheng Guo,Pengfei Wan,Peng Xia,Xuanyang Jin,Shengjun Lu,Yufei Zhang,Haosen Fan
With the rapid development of large-scale clean energy, lithium-sulfur (Li-S) batteries are considered to be one of the most promising energy storage devices. In this manuscript, the polymetallic hetero-nanocrystal of iron nickel@cobalt nitride encapsulating into boron carbonitride nanotubes (Fe 0.64 Ni 0.36 @Co 5.47 N@BCN) was designed and optimized for use as a modified material for commercial polypropylene (PP) separators. The prepared Fe 0.64 Ni 0.36 @Co 5.47 N@BCN-12 hybrid material presents strong chemisorption and catalytic conversion capabilities, which endows the Fe 0.64 Ni 0.36 @Co 5.47 N@BCN-12//PP separator with enhanced polysulfide shuttling inhibition. The assembled Li-S cells with Fe 0.64 Ni 0.36 @Co 5.47 N@BCN-12//PP separators have minimized charge transfer resistance and faster redox kinetics. Additionally, cells with Fe 0.64 Ni 0.36 @Co 5.47 N@BCN-12//PP separator provide high reversible capacity of 674 mAh/g for 400 cycles at 0.5C and excellent cyclability for 1000 cycles at 2C with a low decay rate of 0.05 % per cycle. Therefore, this study provides a feasible functionalization route for improving the electrochemical performance of Li-S batteries through separator modification.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Chemistry
·
2024
·
IF 14
Bin He,Yujie Dai,Shuai Jiang,Dawei Chen,Xilong Wang,Jie Song,Dan Xiao,Qian Zhao,Yan Meng,Wei Feng
Oxygen release and electrolyte decomposition under high voltage endlessly exacerbate interfacial ramifications and structural degradation of high energy-density Li-rich layered oxide (LLO), leading to voltage and capacity fading. Herein, the dual-strategy of Cr x B complex coating and local gradient doping is simultaneously achieved on LLO surface by a one-step wet chemical reaction at room temperature. Density functional theory (DFT) calculations prove that stable B–O and Cr–O bonds through the local gradient doping can significantly reduce the high-energy O 2 p states of interfacial lattice O, which is also effective for the near-surface lattice O, thus greatly stabilizing the LLO surface. Besides, differential electrochemical mass spectrometry (DEMS) indicates that the Cr x B complex coating can adequately inhibit oxygen release and prevents the migration or dissolution of transition metal ions, including allowing speedy Li + migration. The voltage and capacity fading of the modified cathode (LLO-CrB) are adequately suppressed, which are benefited from the uniformly dense cathode electrolyte interface (CEI) composed of balanced organic/inorganic composition. Therefore, the specific capacity of LLO-CrB after 200 cycles at 1C is 209.3 mA h g −1 (with a retention rate of 95.1%). This dual-strategy through a one-step wet chemical reaction is expected to be applied in the design and development of other anionic redox cathode materials.
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2024
·
IF 8.3
Junyuan Hua,Feidong Yang,Jintao He,Jiahui Du,Bo Dong,Xiaohua Ma,Jianxin Li
A great challenge is to develop suitable techniques to extract Li + resources from low-grade salt-lake brines with high Mg/Li ratios. In this study, an efficient ternary extraction system has been constructed using tributyl phosphate (TBP) and crown ether (CE) as the extractant and sodium bistrifluoromethylsulfonimide (NaNTf 2 ) as the auxiliary extractant to extract Li + . Results showed that the single-stage E Li % and SF Li-Mg were up to 74.1 % and 757, respectively, when the O/A was 1, 0.02 mol/l Li + and 0.232 mol/l Mg 2+ . It is noteworthy that the elution of Li + was also as high as 100 % at an O/A volume ratio of 5, when 0.5 mol/l HCl was used as the counter-extractant to recovery Li + . The NMR and FTIR analysis and molecular dynamics (MD) and density functional theory (DFT) revealed that the exceptional performance of the three-component extraction system was attributed to the optimal matching between the diameter of Li + and the cavity size of the CE, as well as the strong affinity exhibited by CE, TBP, and NTf 2 − towards Li + . Specifically, the 2TBP-LiNTf 2 -CE-LiNTf 2 complex structure with the highest binding energy displayed the most structure. In summary, this work paves the way for the recovery of Li + from low-grade salt-lake brine.
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2024
·Vol. 11
·期 30
·2404307
·
IF 14.3
Shiyuan Guo,Yuefeng Su,Kang Yan,Chenying Zhao,Yun Lu,Haoyu Wang,Jinyang Dong,Ning Li,Yun Liu,Yibiao Guan,Feng Wu,Lai Chen
Constructing composite solid electrolytes (CSEs) integrating the merits of inorganic and organic components is a promising approach to developing high-performance all-solid-state lithium metal batteries (ASSLMBs). CSEs are now capable of achieving homogeneous and fast Li-ion flux, but how to escape the trade-off between mechanical modulus and adhesion is still a challenge. Herein, a strategy to address this issue is proposed, that is, intercalating highly conductive, homogeneous, and viscous-fluid ionic conductors into robust coordination laminar framework to construct laminar solid electrolyte with homogeneous and fast Li-ion conduction (LSE-HFC). A 9 µm-thick LSH-HFC, in which poly(ethylene oxide)/succinonitrile is adsorbed by coordination laminar framework with metal–organic framework nanosheets as building blocks, is used here as an example to determine the validity. The Li-ion transfer mechanism is verified and works across the entire LSE-HFC, which facilitates homogeneous Li-ion flux and low migration energy barriers, endowing LSE-HFC with high ionic conductivity of 5.62 × 10 −4 S cm −1 and Li-ion transference number of 0.78 at 25 °C. Combining the outstanding mechanical strength against punctures and the enhanced adhesion force with electrodes, LSE-HFC harvests uniform Li plating/stripping behavior. These enable the realization of high-energy-density ASSLMBs with excellent cycling stability when being assembled as LiFePO 4 /Li and LiNi 0.6 Mn 0.2 Co 0.2 O 2 /Li cells.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Xingwen Lu,Yue He,Zebiao Huang,Jiating Li,Zenghua Qi,Jianqiao Qin,Fei Wang
Addressing the escalating volume of retired lithium-ion batteries (LIBs) is crucial for protecting the environment and minimizing resource wastage. In this study, Li 2 CO 3 and NCM 111 carbonate precursor ((Ni 1/3 Co 1/3 Mn 1/3 )CO 3 ) were successfully generated from the retired ternary LIBs through a combined process of thermal reduction and carbonate precipitation. During the thermal reduction process, graphite interacted with the cathode material (LiNi 0.5 Co 0.2 Mn 0.3 O 2 ) from used LIBs, facilitating the conversion of Li from its LiO x polyhedral structure into Li 2 CO 3 . Simultaneously, the transition metals within LiNi 0.5 Co 0.2 Mn 0.3 O 2 were transformed into Ni (0) , Co (0) , and MnO. Under optimal conditions, a graphite/LiNi 0.5 Co 0.2 Mn 0.3 O 2 mass ratio of 0.15/1 was sintered at 750 °C for 120 min, resulting in the recovery of 98.7% Li as Li 2 CO 3 with a purity of 99.65% through water leaching and evaporation. After isolating Li as Li 2 CO 3 from spent NCM, the residue was dissolved and co-precipitated as NCM111 carbonate precursor ((Ni 1/3 Co 1/3 Mn 1/3 )CO 3 ) using ammonium complexing agents, with recovery ratios of 98.4%, 99.4%, and 99.7% for Ni, Co and Mn, respectively. The recovered precursors exhibited spherical morphology and rhodochrosite crystal structure. These results offer valuable insights into recycling valuable metals from used NCM batteries, thereby promoting the sustainability of the new energy industry.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2025
·
IF 14.9
Xingxing Zhang,Weihao Shi,Qingmei Su,Zemin He,Liming Wang,Xinglong Deng,Dequn Zhao,Rui Yan,Jinqi Chen,Hongli Chen,Zongcheng Miao,Wenhuan Huang
Solid-state lithium metal batteries (SSLMBs) face critical challenges from dendrite growth and unstable interfaces. While composite polymer electrolytes (CPEs) offer promise, poor ionic conductivity (<10 −5 S cm −1 ), low Li + transference numbers ( t Li+ < 0.5), and inadequate interfacial stability limit practical application. Herein, we design a dual-channel metal-organic framework (MOF)-based CPEs that simultaneously regulate ion transport and construct a high-conductivity interphase. This MOF features two distinct channels. The one imposes spatial confinement (0.57 nm in pore size) to suppress anion migration (TFSI − ), while the other facilitates immobilizing TFSI − through iodine-mediated nucleophilic substitution. More importantly, the liberated I − reacts with Li + to in situ generate lithium iodide (LiI)-enhanced solid-electrolyte interphase (SEI), replacing insulating LiF-rich counterparts. This LiI-SEI exhibits superior ionic conductivity and homogenizes Li + flux to suppress dendrites. Integrated into a poly(vinylidene fluoride)-cohexafluoropropylene (PVDF-HFP) matrix, the MOF CPE achieves exceptional ionic conductivity (2.13×10 −4 S cm −1 ) and a high t Li+ of 0.95 (25 °C). Density functional theory and molecular dynamics calculations verify ion-regulation mechanisms. As a result, LiFePO 4 //Li cells retain 94.99% capacity after 800 cycles (1 C), while NCM811//Li cells demonstrate sustained stability over 200 cycles. This work provides valuable insights into the design of multifunctional MOF ionic conductors for high-performance SSLMBs.
✓ 已验证
产品关联
DOI
高影响因子
SOLID STATE IONICS
·
2025
·
IF 3.3
Yongsheng Chen,Siman Yang,Jianbin Zheng,Mingwei Hu,Mingdeng Wei,Peixun Xiong
As an excellent cathode material, lithium iron phosphate (LiFePO 4 ) has been widely used in commercial lithium-ion batteries (LIBs). However, the impact of synthetic conditions on LiFePO 4 cathode derived from amorphous iron phosphate (FePO 4 ) remains underexplored. In the present study, the effects of Li/P molar ratio on the crystallinity and electrochemical properties of LiFePO 4 were investigated in detail using FePO 4 as a precursor. When the Li/P molar ratio in LiFePO 4 was approximately 1, the material exhibited an excellent long-term cycling stability with a high capacity retention of 97 % after 500 cycles. In addition, multiple characterizations demonstrate that the higher molar ratio of the Li/P resulted in the higher concentration of defects in LiFePO 4 crystals, which not only reduced the reversible capacity but also compromised the structural stability, leading to a poor cyclic stability and quick capacity degradation. Therefore, such a work could provide a scientific insight for rational design and synthesis of high-performance LiFePO 4 cathodes from amorphous FePO 4 precursor.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Zhe Wang,Xushan Wang,Jiawei Cao,Xiaonan Yan,Xinbo Zhang,Haitao Wen,Weichao Hu,Yongzhu Zhou
Lithium is a strategic resource critical for national defense and renewable energy applications. However, in most salt lake brines, lithium coexists with high concentrations of Mg 2+ , posing a major challenge for lithium extraction. The similar hydration radius of Mg 2+ (0.428 nm) and Li + (0.382 nm) lead to poor separation selectivity, significantly hindering efficient lithium recovery. Therefore, achieving efficient and selective separation of Mg 2+ and Li + is of paramount importance for sustainable lithium extraction from salt lake brines. To address this challenge, we designed a novel positively charged nanofiltration membrane (NFM) by interfacial polymerization using a tri-quaternary ammonium monomer, N,N,N′,N″,N″-pentamethyldiethylenetriamine (QPMDETA), anchored onto a polyethyleneimine (PEI)-based selective layer. This approach significantly enhances both the positive charge density and surface hydrophilicity, enabling superior Mg 2+ /Li + separation performance. Through rational modification, the QPMDETA-NFM exhibited significantly enhanced positive charge density and hydrophilicity, demonstrating an isoelectric point of 9.39 and an outstanding MgCl 2 permeability of 128.41 L·m −2 ·h −1 ·MPa −1 . The membrane achieved excellent separation performance, with a 96.04 % rejection rate for Mg 2+ and a stable Mg 2+ /Li + separation factor of approximately 11, even under challenging conditions of a 50:1 Mg 2+ /Li + ratio in a 2000 ppm mixed salt solution. Molecular dynamics simulations and density functional theory calculations further elucidated the water molecule transport mechanisms in QPMDETA-NFM. This study presents a novel strategy for developing high performance positively charged NFM for efficient lithium extraction from aqueous systems.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Suxing Xue,Huan Zhang,Huan He,Yachao Jin,Li Song,Mingdao Zhang
Due to the exceptional specific capacity, high energy density, and low cost, Li-rich manganese-based cathode materials (LRMCs) have emerged as promising candidates for next-generation lithium-ion batteries. However, their practical applications are hindered by relatively low initial Coulombic efficiency (ICE), continuous voltage fading during cycling, and poor capacity retention. In this study, Polyvinylpyrrolidone (PVP) and melamine are employed to treat the material surface, generating oxygen vacancies and forming a protective nitrogen-doped carbon layer. The presence of oxygen vacancies not only enhances Li + diffusion kinetics but also plays a critical role in suppressing voltage decay by activating stable cationic redox and minimizing irreversible oxygen release, which is key to the enhanced ICE. Additionally, the N-doped carbon coating establishes efficient electron conduction networks, facilitating efficient charge transfer. The modified materials exhibit an initial discharge capacity of 301.65 mAh g −1 at 0.1C (vs. 268.13 mAh g −1 for the pure Li 1.2 Mn 0.54 Ni 0.13 Co 0.13 O 2 (LMNCO)), with an ICE of 87.88 % (pristine 77.46 %). After 200 cycles, the capacity retention reaches 85.17 % (compared to 45.16 % for the pure materials), and the voltage decay decreases from 0.72 V to 0.51 V. This study provides an important exploration for overcoming the challenges in the development of high-performance Li-rich manganese-based cathode materials.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 38
·26076-26082
·
IF 10.7
Haifeng Yu,Erdong Zhang,Jinxun Yu,Songmin Yu,Yaoguo Fang,Ling Chen,Hao Jiang,Chunzhong Li
Olivine-type LiMnxFe1−xPO4 (LMFP, 0 < x < 1) is poised to supplant LiFePO4 cathode materials with a ∼20% energy-density increase for Li-ion batteries (LIBs). However, its intrinsic low conductivities and MnO6 octahedral unit-cell Jahn–Teller distortion limit its power capability and cycling life. Herein, we report a Mg/Ni dual-doped and carbon-coated LMFP micro-sized secondary sphere with greatly enhanced reaction kinetics and superior structure stability. Ni2+ reduces the average valence state of Mn ions to alleviate Jahn–Teller distortion by participating in charge compensation during charging while improving electronic conductivity together with carbon coating. Mg2+ with a smaller ion radius (65 pm) significantly widens the Li-ion transfer channel by extending Li–O bonds. The as-obtained LMFP cathodes increase reversible specific capacity by about 2.4 times at 5C compared with a pristine sample, reaching 115 mA h g−1. In a pouch-type full cell, 92% of its initial capacity is still maintained after 2000 cycles at 1C, demonstrating its attractive potential for practical application in high-power and long-life LIBs.
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2022
·Vol. 46
·期 14
·19357-19367
·
IF 4.672
Jiuqing Liu,Feifei Song,Junying He,Zikun Hong,Qihou Li,Ya Chen,Lishun Bai,Fanli Zeng,Chen Cheng,Zehao Chen
Summary Owing to its unparalleled theoretical energy density, the Li-O 2 batteries are thought to be one of the most promising energy storage systems, but its application is seriously hindered by its potential safety risks arising from the passivation and corrosion of lithium anode. To address these issues, it is an efficient way to develop functionalized separator that could prevent the migration of anions and macromolecules from cathode toward anode. Herein, a novel Nafion-functionalized polyethersulfone (PES)-based ion-permselective separator was prepared by using non-solvent induced phase separation (NIPS) method. The Nafion ensures a better physical strength of the composite separator, and further characterizations show that the obtained composite separator owns good ionic conductivity (0.52 mS cm −1 ), high lithium ion migration number (0.80), and better cyclic stability (120 cycles, 1000 mAh g −1 ). Consequently, the composite separator serves as an excellent candidate to solve the “shuttle effect” of redox mediators (RMs), the assembled Li-O 2 battery with composite separator adding LiI as RMs presents lower charge overpotential and longer cycle stability (170 cycles, 1000 mAh g −1 ).
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）