CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Gui-lin Zhuang,Yi-fen Gao,Xiang Zhou,Xin-yong Tao,Jian-min Luo,Yi-jing Gao,Yi-long Yan,Pei-yuan Gao,Xing Zhong,Jian-guo Wang
Herein we report a facile bottom-up strategy to prepare highly dispersed supported Co 3 O 4 on N-doped Porous Carbon (NPC). Specifically, ZIF-67 (ZIF = Zeolitic Imidazolate Frameworks) microcrystals firstly grow on benzoic acid modified covalent organic framework (BFC), resulting in ZIF-67/COF composite. Subsequently, highly dispersed Co 3 O 4 /NPC was obtained via the calcination of ZIF-67/COF. Interestingly, high dispersion of supported Co 3 O 4 is dominated by homogeneous distribution of benzoic acid auchoring on nanoporous COF . More notably, largely triggered by the porosity and confining effect of COF , the resultant Co 3 O 4 /NPC features highly active crystal plane and a large specific surface area of 228.0 m 2 /g. Furthermore, the oxygen evolution reaction (OER) measurement results demonstrated that highly dispersed Co 3 O 4 /NPC features good catalytic activity (330 mV overpotential at 10 mA.cm −2 , 79 mV.dec −1 Tafel slope and mass activity of 130 A.g −1 at overpotential of 400 mV) and durable stability, superior to currently available counterparts. Moreover, Li-ion battery (LIB) tests also showed high reversible capacity (785 mA.h.g −1 at 500 mA.g −1 ) as well as excellent cycling stability and rate performance. Furthermore, Density functional theory (DFT) calculation results demonstrated that these superior OER properties can be attributed to the geometrical and electronic effects of Co 3 O 4 /NPC on activation and adsorption/desorption of reaction species.
✓ 已验证
DOI
高影响因子
Separations
·
2026
·Vol. 13
·期 10
·298
·
IF 3.5
Xinyu Wang,Haoli Tian,Huayan Zhang,Yahui Shan
Ultrasound-assisted deep eutectic solvent (DES) extraction was developed for the efficient recovery of total flavonoids fromPolygonum hydropiperL., a traditional Li medicinal plant from Hainan, China. Among 30 DES formulations screened, betaine-glycerol (Bet-Gly, 1:2) afforded the highest total flavonoid yield and was selected for further optimization. The extraction conditions were systematically optimized through single-factor experiments, Plackett–Burman screening, and Box–Behnken response-surface methodology. The predicted optimal conditions (water content 28.08%, solid-to-liquid ratio 1:37.58, and extraction time 30.69 min) were adjusted to 28.10%, 1:38, and 31 min for practical operation, yielding 3.98 mg RE/g DW, in close agreement with the predicted value of 4.13 mg RE/g DW. Compared with 70% ethanol and water, Bet-Gly increased the total flavonoid yield by 39.6% and 131.4%, respectively (p<0.05), and the resulting extract showed the lowest IC50values in both ABTS and DPPH radical-scavenging assays. UPLC-Q-TOF-MS/MS tentatively identified eight phenolic constituents, mainly flavonoids, in the DES extract. Molecular dynamics simulations further revealed more homogeneous distributions of five representative flavonoids and more favorable flavonoid-solvent interaction energies in Bet-Gly than in water or 70% ethanol, indicating that electrostatic and van der Waals interactions contributed to enhanced flavonoid solvation. Overall, this study integrates DES screening, process optimization, chemical characterization, antioxidant evaluation, and molecular simulation, linking the improved extraction performance of Bet-Gly with favorable flavonoid-solvent interactions at the molecular level.
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2026
·Vol. 14
·期 29
·13031-13041
·
IF 7.6
Luo Qionglin,Xu Zhen,Zhang Sitian,Li Zhiling,Ren Kaixiang,Ding Can,Li Yongtao,Peng Cong,Zeng Shunqin
PEO-derived polymer electrolytes hold promise for economical, deformable lithium metal batteries with elevated energy density. Nevertheless, their deployment is constrained by insufficient Li + transport, restricted electrochemical stability, uncontrolled Li dendrite proliferation, and inferior anode cyclability. Herein, we introduce oxygen-deficient Nb 2 O 5 (Ov-Nb 2 O 5 ) into a polyethylene oxide host to fabricate an innovative solid-state electrolyte. The Ov-Nb 2 O 5 particles anchor PEO chains via Lewis acid−base interaction, forming a robust oxide−polymer interface. This interaction effectively prevents filler aggregation and reduces PEO crystallinity, yielding a homogeneous electrolyte membrane with enhanced mechanical strength. The resulting architecture accelerates Li + migration across the polymer, thereby elevating ionic transport and restraining dendrite advancement. The PEO/LiTFSI/10%Ov-Nb 2 O 5 electrolyte demonstrates a conductivity of 2.5 × 10 −4 S cm −1 alongside a Li + transference number of 0.63 at 60 ° C. Furthermore, Li-metal symmetric cells sustain steady deposition/dissolution exceeding 1500 h under 0.2 mA cm −2 . When paired with a LiFePO 4 cathode, the full cell achieves a reversible capacity of 121.4 mAh g −1 at 0.5 C and retains 91.7% of its capacity after 400 cycles. This investigation underscores an effective approach for engineering multifunctional fillers toward advanced solid electrolytes featuring rapid ion conduction and exceptional interfacial durability.
✓ 已验证
产品关联
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2026
·
IF 5.7
Zhiyang He,Zhengqi Zhu,Yanfeng Chen,Feng Xue,Shengui Ju
Silane coupling agent (KH570) was grafted onto Li 2 TiO 3 @GO via its -OH group. • The 12-crown-4 functional group serves as a side arm for the Li + imprinting agent. • H 2 TiO 3 @GO-CR was engineered and exhibited a bifunction Li + capture effect. To enhance lithium-ion adsorption performance, we designed a novel ion-sieve (denoted as H 2 TiO 3 @GO-CR) that synergistically combines the ion-imprinting effect with the intrinsic lithium capture capability of H 2 TiO 3 . This ion-imprinted monomer containing 12-crown-4-ether groups was fabricated through a two-step reaction involving ring-opening and self-condensation. The abundant -OH functional groups on graphene oxide (GO) served as a bridge to graft this monomer onto H 2 TiO 3 . The successful incorporation of the crown ether into the composite was proved by the FT-IR band at 553 cm −1 , and the Raman shift at 154.2 cm −1 . Owing to its unique dual-adsorption structure and functional groups, H 2 TiO 3 @GO-CR exhibited an excellent adsorption capacity of 39.87 mg·g −1 , with XPS analysis verifying an elevated surface hydroxyl (OH) content of 65.68%. In selectivity tests using simulated salt lake brine, the separation factors ( α Li Me) of H 2 TiO 3 @GO-CR for Li + against competing ions (Na + , K + , Ca 2+ , Mg 2+ ) all exceeded 80, demonstrating exceptional selectivity toward Li + . The α Li Mg = 295.0 shows high selectivity in salt lake brine, which is further substantiated by density functional theory (DFT) calculations of adsorption energies. This work brings a novel strategy for developing bifunctional lithium ion-sieves. Download: Download high-res image (265KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Dayan Li,Xiufang Cui,Yuqi Dong,Xin Wen,Haoyu Song,Xinyue Dai,Guo Jin,Wei Zheng,Yuyun Yang
A novel composite coating with sandwich structure was prepared on the anodic oxidation coating (AO coating) of Mg-Li alloy, which was mainly composed of layered double hydroxide (LDH) nanosheets and electroless NiP coating. The microstructure differences between classical MgAl-LDH nanosheets and high entropy MgAlNiCrZn-LDH nanosheets (HE-LDH) and their effects on the corrosion resistance of the coatings were investigated, especially the effects of the two types of LDH nanosheets on the galvanic corrosion between Mg-Li alloy and Ni alloy coatings. The results show that the sandwich composite coating can effectively improve the corrosion resistance of Mg-Li alloy, especially to inhibit galvanic corrosion. The lifting effect of high entropy LDH sandwich composite coating is significantly higher than that of the MgAl-LDH sandwich composite coating. The coupling current density between Mg-Li alloy and Ni coating was reduced by one order of magnitude, and the self-corrosion current density of composite coating was reduced to 3.31×10 -7 A·cm -2 . HE-LDH nanosheets had better corrosion resistance, which may be due to the high charge density and densification of high-entropy LDH, which increased the adsorption and physical barrier to Cl - .
✓ 已验证
DOI
高影响因子
DESALINATION
·
2026
·
IF 9.9
Jiadi Ying,Zhen Cui,Xiaoxiang Xi,Junwei Zhu,Tiancun Liu,Song Lu,Qi Shen,Min Guo,Yeqing Wang,Zhen Yang,Yaochun Chen,Minfeng Zeng,Zhixin Yu,Yuqing Lin
The selective separation of Li + from Mg 2+ in salt lake brines is critical for sustainable lithium supply but remains challenging due to their similar hydrated radii. Unlike conventional approaches that rely on a single polyelectrolyte system, this study introduces a comparative layer-by-layer (LbL) assembly strategy to systematically screen optimal polycationic building blocks. We employ two distinct polycations, polyethyleneimine (PEI) and chitosan (Cs), paired with poly(sodium 4-styrenesulfonate) (PSS) on a sulfonated poly(ether ether ketone) (SPEEK) substrate, and systematically elucidate how polycation chemistry governs membrane structure, surface charge, and ion-transport behavior across the entire LbL assembly series. The optimized PEI7.5 membrane delivers a Li + /Mg 2+ permselectivity of 9.7, a 13-fold improvement over pristine SPEEK (0.73) and a 31% enhancement over Cs7.5 (7.4), while maintaining a high Li + flux of 0.22 mol·m −2 ·h −1 . This performance represents one of the highest selectivity values reported for LbL-assembled monovalent cation exchange membranes. Combined experimental characterization and molecular dynamics simulations reveal that the superior performance of PEI-based membranes originates from synergistically enhanced denser positive charge sites and narrower pore size distribution, which collectively impose stronger electrostatic repulsion and steric hindrance against Mg 2+ . Overall, this work not only establishes a robust structure–property relationship for LbL-assembled polyelectrolyte membranes, but also provides a polycation-screening paradigm and a mechanistic framework for rationally designing next-generation cation exchange membranes toward high-efficiency lithium extraction from brines.
✓ 已验证
产品关联
DOI
高影响因子
Small Methods
·
2021
·Vol. 5
·期 7
·2100262
·
IF 14.188
Fanglin Xu,Shungui Deng,Qingya Guo,Dong Zhou,Xiayin Yao
Poly(vinylidene fluoride)-based polymer electrolytes are being intensely investigated for solid-state lithium metal batteries. However, phase separation and porous structures are still pronounced issues in traditional preparing procedure. Herein, a bottom-to-up strategy is employed to design single-phase and densified polymer electrolytes via incorporating quasi-ionic liquid with poly(vinylidene fluoride- co -hexafluoropropylene). Due to strong ion/dipole–dipole interaction, the optimized polymer electrolyte delivers high room-temperature ionic conductivity of 1.55 × 10 −3 S cm −1 , superior thermal and oxidation stability of 4.97 V, excellent stretchability of over 1500% and toughness of 43 MJ cm −3 as well as desirable self-extinguishing ability. Furthermore, the superb compatibility toward Li anode enables over 3000 h cycling of Li plating/stripping and ≈98% Coulombic efficiency in Li||Cu test at 0.1 mA cm −2 . In particular, lithium metal battery Li||LiNi 0.6 Co 0.2 Mn 0.2 O 2 exhibits a room-temperature discharge retention rate of 96% after 500 cycles under a rate of 0.1 C, which is associated with the rigid-flexible coupling electrodes/electrolytes interphase. This investigation demonstrates the potential application of quasi-ionic liquid/polymer electrolytes in safe lithium metal batteries.
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Gang Liu,Zixuan Fang,Tingting Feng,Ming Zhang,Mengqiang Wu
Lithium oxides (Li 2 O) possess a considerable theoretical capacity, rendering them highly promising as cathodic pre-lithiation additives. However, its decomposition voltage exceeds the charging cut-off voltage of most cathode materials , hindering its direct use as a cathode sacrificial additive. Herein, we design a facile and safe method to reduce the decomposition energy of Li 2 O at room temperature to offset the irreversible capacity loss by using a core–shell structured Li 2 O-reduced graphene oxide (rGO)-polyethylene glycol (PEG) composite (denoted as Li 2 O-rGO-PEG). The graphene oxide (GO) was heat-treated to remove oxygen functional groups to synthesize rGO, and then reacted with Li 2 O to form a Li 2 O-rGO composite. According to the DFT calculations, the density of states at the Fermi level of Li 2 O-rGO becomes continuous and features a metallic nature, which significantly improves the electrical conductivity of Li 2 O and facilitates electron conduction that modify the delithiation potential of Li 2 O. PEG was used to enhance the cohesive force between rGO and Li 2 O and to protect Li 2 O from atmospheric contamination. Moreover, in order to demonstrate the excellent pre-lithiation ability of Li 2 O-rGO-PEG composite, hard carbon (HC) with low initial coulombic efficiency (ICE) was used as the anode. In the application of LFP (Li 2 O)/HC full cell, Li 2 O was decomposed to Li + to effectively improve the initial charge capacity from 149.7 to 200 mAh/g and discharge capacity from 104.2 to 147.5 mAh/g, which are 33.6 % and 41.6 % higher than those of the pristine LFP/HC full cell, respectively. The cathode pre-lithiation method proposed in this work is simple and environmentally friendly. The successful utilization of Li 2 O as a pre-lithiation additive effectively addressed the issue of low initial coulombic efficiency of the HC, indicating excellent prospects for practical applications.
✓ 已验证
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 125
·102993-102999
·
IF 3.84
Luyu Yang,Wei Liu,Huanlei Wang,Shuang Liu,Jifei Wang,Jiaxin Chen
A hierarchical pore structure is believed to be an excellent architecture for metal oxide anode materials of lithium-ion batteries (LIBs). However, the difficulty and complication in synthesis limit their further application. In this work, a novel Fe3O4/C composite with a hierarchical pore carbon (HPC) network has been synthesized simply by one-step pyrolysis synthesis using ferrous gluconate as the precursor. This hierarchical porous framework derived from a loose assembly of the intersecting porous carbon rods presents a wide range of pore sizes and a rather large surface area (>226 cm2 g−1). Embedded with well-crystalline Fe3O4 particles, the resulting Fe3O4@HPC composite exhibits a high capacity of 1112 mA h g−1 at the end of the 100th cycle and an enhanced rate performance of above 600 mA h g−1 at a high current density of 2000 mA g−1. This might derive from the unique hierarchical pore system with a high overall porosity, which can not only facilitate the electrolyte diffusion but also alleviate severe volume variation efficiently in lithium ion insertion/extraction. More importantly, this provides us with a successful example to fabricate advanced anode materials simply by one-step pyrolysis of cheap organic–inorganic hybrids at low-cost.
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Nan Lu,Xi Zhang,Ruiqi Na,Wendi Ma,Chongyang Zhang,Yuchao Luo,Yongfeng Mu,Shuling Zhang,Guibin Wang
The synthesis of a nanocomposite gel polymer electrolytes (NGPEs) using Li + -functionalized SPEEK (SPEEK(Li)) nanofiber membrane as a matrix, cross-linked PVA as a gelled agent and LiClO 4 as an electrolytic salt for electric double layer capacitors (EDLCs) were reported in this work. Compared with conventional PVA based gel electrolyte, the “SO 3 − Li + ” functional groups and the pores structure of the SPEEK(Li) nanofiber membrane improves the ionic conductivity as well as mechanical stability , which made the prepared NGPEs exhibited a high ionic conductivity of 8.9 × 10 −3 S cm −1 at ambient temperature and a large voltage stability window range from 0 to 2.0 V. The fabricated symmetric EDLCs showed a specific capacitance of 146.96 F g −1 at a current density of 0.5 A g −1 , with a maximum energy density of 18.26 W h kg −1 . Meanwhile, the EDLCs showed outstanding cyclical stability of 98% specific capacitance retention after 3000 cycles GCD testing, all of these results indicated that the NGPEs should be appropriate to EDLCs and next-generation energy storage systems .
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子化学
·
纳米技术
·
固体电解质
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Yixin Ge,Junchao Qian,Chengbao Liu,Feng Chen
A high nickel content layered cathode material such as LiNi0.92Co0.04Mn0.04O2 (N92) is regarded as an extremely promising candidate for a next-generation high-energy-density lithium ion battery (LIB) owing to the large specific capacity and low cost. Nonetheless, some undesirable defects, including structure instability, large cation mixing between Ni2+ and Li+, and serious side reactions caused by high oxidation of Ni4+, have made this competitor difficult to put into a practical application. In the present work, the high speed mill-balling method is adopted to prompt the lithium superionic conductor Li0.388Ta0.238La0.475Cl3 (LTLC) cover on the surface of N92 particles to enhance the large rate and low-temperature discharge performance, maintain the cyclic stability, and strengthen the safety behaviors. As a result, the LTLC covering layer accompanied by La3+ and Ta5+ doping could not only suppress the side reactions and enhance the whole structure stability of a cathode but also contribute to improving the Li+ intercalation/deintercalation efficiency from the cathode material interface and accelerating the Li+ diffusion rate in the cathode bulk. Compared to N92, the cathode after 2% LTLC covering indeed demonstrates much better electrochemical properties and enhanced safety performance, which exhibits great practicality when applied in high-energy-density LIB.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Xun Chen,Guixiang Zhang,Jiale Zeng,Rongkang Zhu,Weina Deng,Wei Zhou,Liang Chen,Changsheng An,Han Chen,Hai Zhu
As a cathode with a high energy density for Li-ion batteries, Li-rich layered oxide (LLO) cathodes suffer from short lifespans and poor rate performance, mainly due to their irreversible lattice oxygen evolution leading to severe structural degradation and oxygen release. Herein, we propose the use of Zn-doped SnO 2 coated with LLO cathode to tackle these issues. Compared to the traditional method of coating oxides on the surface of lithium-rich cathodes, Zn doping of SnO 2 coating can artificially create abundant oxygen vacancies for LLO cathode, which can provide a buffer boundary for active oxygen generated by lithium-rich cathode during circulation, effectively promoting the reversible reaction of oxygen redox couple and stabilizing lattice oxygen. The experimental results show that the surface of the LLO cathode's Zn-doped SnO 2 is rich in oxygen vacancies could significantly boost the kinetics of lithium ion transfer, and effectively inhibit layer-to-spinel phase transition, and lattice oxygen release. By taking advantage of the Zn-doped SnO 2 coating, the capacity stability of LLO cathode is raised from 58.1 % to 86.7 % at 1C after 500 cycles and also obtains outstanding rate performance and cycling durability at wide-temperature (−10 to 55 °C).
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）