Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 36
·20614-20623
·
IF 10.733
Wei Kou,Guohui Chen,Yang Liu,Weixin Guan,Xiangcun Li,Ning Zhang,Gaohong He
To realize an Al-free cathode and to push forward the Li–S battery technology for practical applications, a multifunctional three-layer-structured Fe3C/C membrane was prepared at a large-scale via a facile phase-inversion method. The scalable yet flexible self-supporting Fe3C/C membrane is an ideal Al foil-free cathode material for high-energy and long cycling Li–S batteries. The conductive dense layer of the Fe3C/C membrane can replace the Al foil as a current collector and the finger-like macropores can host most of the sulfur active material (1.5–3.0 mg cm−2), thus buffering the volume expansion of the sulfur species and facilitating the ion/electrolyte transport for fast reaction kinetics; meanwhile, the sponge-like pores in the top layer of the composite membrane enable further S slurry loading. Density functional theory simulation (DFT) and Li2S6 adsorption measurements reveal that the doped Fe3C species in the composite membrane could effectively immobilize the S species and suppress the shuttle effect of the soluble polysulfides (LiPSs). The rationally designed Fe3C/C membrane cathodes could deliver a capacity of ∼601 mA h g−1 at 1C after 200 cycles even at a high sulfur loading of 3.4 mg cm−2, with a high areal capacity of 2.1 mA h cm−2. The cell with the sulfur loading of 3.4 mg cm−2 delivered a gravimetric energy density and volumetric energy density of 850 W h kg−1 and 1223 W h L−1, respectively. The self-supporting membrane cathode with simultaneous commercial S filling and S/C slurry coating provides an alternative sulfur loading approach for battery assembly, thus presenting a useful strategy for practical applications in high energy-density and long cycling Li–S batteries.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Keting Li,Yufan Hao,Na Yang,Longfei Zhang,Luhong Zhang,Yongli Sun,Bin Jiang
Polyethyleneimine (PEI) nanofiltration (NF) membranes demonstrate remarkable effectiveness in separating lithium and magnesium from salt lakes, attributed to their positively charged surface. However, undesired permeability resulting from densely cross-linked structures limits the further industrial applications and development of PEI NF membranes. Herein, a high permeable Mg 2+ /Li + separation NF membrane with stronger internal and surface positive charge was fabricated using 1-Aminopyridinium iodide (1-AI) for the first time through a capping-grafting synergistic strategy. On the one hand, the monoamine character of 1-AI can realize the end-capping (EC) effect on the acyl chloride monomers in the interfacial polymerization process, which can contribute to a reduction in the cross-linking degree of the membrane. On the other hand, 1-AI with a quaternary ammonium group as the surface grafting (SG) agent can significantly improve the surface positive charge property of the membrane. The synergistic effect of capping-grafting not only rendered the membrane looser and effectively enhanced the surface positive charge of the membrane, but also increased the depth of grafting modification, leading to a notable rise in the internal positive charge of the membrane. After the capping-grafting treatment, the water permeance of the PEI-EC/SG membrane reached 19.8 L·m −2 ·h −1 ·bar −1 , approximately 4.5 times that of the original PEI membrane, while keeping an ideal MgCl 2 rejection rate (97.1%) and exhibiting good Mg 2+ /Li + selectivity (27.7). This work demonstrates the advantages of the capping-grafting synergistic method in regulating membrane structure for improving permeability as well as the surface and internal charge properties of the membrane for enhancing ion selectivity.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Wenhui Cao,Mengyu Liu,Kai Zhang,Shenghao Zhang,Caixia Li,Yonghong Wen,Qingliang Lv,Qin Wen,Lei Wang
Lithium-sulfur (Li-S) batteries have attracted significant attention due to their high theoretical energy density, low cost and environmental friendliness, which are considered one of the most promising candidates for next-generation energy storage devices. However, the sluggish kinetics associated with sulfur oxidation–reduction reactions and the detrimental shuttle effect caused by lithium polysulfides (LiPSs) significantly impacts the electrochemical performance of Li-S batteries. In this work, Co single-atom catalyst (Co SAC -NC) on an ordered macro-microporous structure are designed, and the catalyst are coated onto 2325 separator. The ordered micro-microporous structure of Co SAC -NC enhances the interaction with LiPSs and provide reservoir for LiPSs. Secondly, the highly exposed Co-N x configuration active sites can effectively anchor LiPSs and promotes their rapid conversion. This work significantly improves the utilization efficiency of the cathode, resulting in an exceptionally low-capacity decay rate of just 0.043 % per cycle over 1000 cycles at 1 C.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DESALINATION
·
2024
·
IF 8.3
Jia-Min Jin,Hao Ye,Tian-Hao Li,Ming-Bang Wu,Lin Liu,Juming Yao
Positively charged and non-toxic intermediate layers are highly desirable for the construction of nanofiltration membranes in the field of Mg 2+ /Li + separation. Herein, we have prepared dual-electric layer nanofiltration membranes via introducing positively charged quaternized cellulose nanocrystals (Q-CNC) beyond the negatively charged polyamide skin layers. On the one hand, the strong interactions between Q-CNC and piperazine (PIP) could regulate the thickness, roughness, and residual groups of the polyamide (PA) layers, resulting in improved water flux. On the other hand, the Q-CNC has lots of positive charges which are beneficial for enhancing the rejections of negatively charged polyamide skin layers towards divalent cations since the Donnan and electrostatic effects are long-range forces. Moreover, this effect could be amplified by reducing the thickness of skin layers or decreasing the contents of residual carboxyl groups via adjusting the monomer concentrations. The obtained nanofiltration membranes possess high water flux of 51 L/m 2 /h/bar, and rejection for MgCl 2 of 86 %. The separation factor of Mg 2+ /Li + is 29 when the Mg 2+ /Li + mass ratio in the feed solution is 20:1. Moreover, the nanofiltration membrane with Q-CNC intermediate layers (QNFM) has good antibacterial properties, showing great potential in the fields of lithium extraction from salt lakes.
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2024
·
IF 13
Zhiying Gao,Jingming Yao,Jitong Yan,Jun Sun,Congcong Du,Qiushi Dai,Yong Su,Jun Zhao,Jingzhao Chen,Xiaomei Li,Hui Li,Pan Zhang,Jun Ma,Hailong Qiu,Liqiang Zhang,Yongfu Tang,Jianyu Huang
Rechargeable aprotic lithium (Li)-oxygen battery (LOB) is a potential next-generation energy storage technology because of its high theoretical specific energy. However, the role of redox mediator on the oxide electrochemistry remains unclear. This is partly due to the intrinsic complexity of the battery chemistry and the lack of in-depth studies of oxygen electrodes at the atomic level by reliable techniques. Herein, cryo-transmission electron microscopy (cryo-TEM) is used to study how the redox mediator LiI affects the oxygen electrochemistry in LOBs. It is revealed that with or without LiI in the electrolyte, the discharge products are plate-like LiOH or toroidal Li 2 O 2 , respectively. The I 2 assists the decomposition of LiOH via the formation of LiIO 3 in the charge process. In addition, a LiI protective layer is formed on the Li anode surface by the shuttle of I 3 − , which inhibits the parasitic Li/electrolyte reaction and improves the cycle performance of the LOBs. The LOBs returned to 2e − oxygen reduction reaction (ORR) to produce Li 2 O 2 after the LiI in the electrolyte is consumed. This work provides new insight on the role of redox mediator on the complex electrochemistry in LOBs which may aid the design LOBs for practical applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 100
·97912-97920
·
IF 3.289
Chuanting Liu,Ziqiang Shao,Jianquan Wang,Chengyi Lu,Zhenhua Wang
A novel eco-friendly polyvinyl alcohol/cellulose nanofiber–Li+ (PVA/CNF–Li) composite separator was prepared for lithium-ion batteries. In this membrane by a non-solvent induced phase separation (NIPS) wet-process, CNF–Li originating from wood pulp was successfully prepared and characterized by FT-IR and TEM. The composite separators showed excellent porosity of over 60%, and better ionic conductivity (∼1.1 mS cm−1) as well as remarkable electrolyte uptake approaching 2.3. CNF–Li combined the excellent properties of both nanofibers and ion-conductive polymers such as CMC–Li. The introduction of CNF–Li in the separator increased the thermal dimensional stability and mechanical performance. Simultaneously, CNF–Li as a constituent in the membrane increased the contents of Li+, opening a way for Li+ transportation to improve batteries' Li+ diffusion efficiency and specific capacity. The battery with a 2 wt% CNF–Li separator retained 93% of the initial reversible capacity after 50 cycles, which was much higher than that of the commercial polypropylene (PP) separator with a value of 80%. The PVA/CNF–Li composite membrane produced via a relatively low cost and eco-friendly method can serve as a potential alternative of commercial PP separators applied in high-performance lithium-ion batteries.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2016
·Vol. 99
·期 7
·2354-2360
·
IF 2.787
Dong-Sheng Yin,Zhi-Hao Zhao,Ye-Jing Dai,Zhe Zhao,Xiao-Wen Zhang,Si-Hui Wang
By conventional ceramics sintering technique, the lead-free 0.85Bi 0.5 Na 0.5(1− x ) Li 0.5 x TiO 3 -0.11Bi 0.5 K 0.5 TiO 3 -0.04BaTiO 3 ( x =0–0.15) piezoelectric ceramics were obtained and the effects of Li dopant on the piezoelectric, dielectric, and ferroelectric properties were studied. With increasing Li addition, the temperature-dependent permittivity exhibited the normal ferroelectric-to-ergodic relaxor (FE-to-ER) transition temperature ( T FE - ER , abbreviated as T F-R ) decreasing down to room temperature. The increasing Li content also enhanced the diffuseness of the FE-to-ER transition behavior. For composition with x = 0.15, a large unipolar strain of 0.37% ( = S max / E max = 570 pm/V) was achieved under 6.5 kV/mm applied electric field at room temperature. Both unipolar and bipolar strain curves related to the temperature closely, and when the temperature reached the T F-R , the normalized strain achieved a maximum value (e.g., for x = 0.10, = 755 pm/V) owing to the electric-field-induced ER-to-FE state transition.
✓ 已验证
产品关联
DOI
高影响因子
OPTIK
·
2017
·
IF 0.835
Renping Cao,Jijun Huang,Xiangfeng Ceng,Zuofu Hu,Ting Chen,Wen Hu,Xinqin Zhang
Ca 3 Nb 2 O 8 :Sm 3+ phosphor is synthesized by solid-state reaction method in air. Host Ca 3 Nb 2 O 8 emits blue light with excitation 260 and 314 nm, and its emission band peaking at ∼460 nm is attributed to the 3 T 1,2 → 1 A 1 transations in [Nb 2 O 8 6− ] group. Ca 3 Nb 2 O 8 :Sm 3+ phosphor with excitation 314 nm shows a systematically tunable emission by adjusting Sm 3+ ion concentration , and only emits reddish-orange light with excitation 407 nm. Excitation band indicates that Ca 3 Nb 2 O 8 :Sm 3+ phosphor may be effectively excited by (∼407 nm) near ultraviolet light-emitting diode chip. The optimal Sm 3+ ion concentration is ∼5 mol% in Ca 3 Nb 2 O 8 :Sm 3+ phosphor. Emission intensity of Ca 3 Nb 2 O 8 :Sm 3+ phosphor may be increased ∼1.4 times by co-doping Li + ions as charge compensator and fluxing agent roles. The experimental results will contribute to studying novel Sm 3+ -doped luminescent materials.
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL ENGINEERING
·
2017
·
IF 1.082
Ting Fan,Jiantao Lü,Guoji Li,Yongfa Huang
Polyvinyl pyrrolidone- (PVP) and ethylene glycol- (EG) coated water dispersible mesoporous CaF2:Eu3+,Li+ nanocrystals were synthesized by a simple one-pot hydrothermal method. The role of Li+ ions on the morphology and spectra in the CaF2 nanocrystals have been reported. The synthesized nanocrystals were monodisperse with regular sphere-like shapes and exhibited obvious hollow mesoporous structure. The results from x-ray photoelectron spectroscopy determined the successful incorporation of Eu3+ ions and Li+ ions into the CaF2 host lattice. The excitation and emission intensity of Eu3+ enhanced with Li+ concentration until 7 mol.%. The nanocrystals could disperse in water for more than a month due to the EG and PVP molecules coated over the nanocrystals.
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2016
·
IF 2.183
Renping Cao,Wenjie Luo,Haidong Xu,Zhiyang Luo,Qianglin Hu,Ting Fu,Dedong Peng
YbAlO 3 :Mn 4+ , YbAlO 3 :Mn 4+ , Li + , and YbAlO 3 :Mn 4+ , Mg 2+ phosphors are synthesized by high temperature solid-state reaction method in air. Their crystal structures and luminescence properties are investigated. Photoluminescence excitation (PLE) spectrum monitored at 677 nm contains broad PLE band with three PLE peaks located at ∼318, 395, and 470 nm within the range 220–600 nm. Emission spectra with excitation 318 and 470 nm exhibit three emission band peaks located at ∼645, 677, and 700 nm in the range of 610–800 nm and their corresponding chromaticity coordinates are about ( x = 0.6942, y = 0.3057). The possible luminous mechanism of Mn 4+ ion is analyzed by the simple energy level diagram of Mn 4+ ion. The optimum Mn 4+ -doped concentration in YbAlO 3 :Mn 4+ phosphor is about 0.4 mol% and the luminescence lifetime of YbAlO 3 :0.4%Mn 4+ phosphor is ∼0.59 ms. Emission intensity of YbAlO 3 :0.4%Mn 4+ phosphor can be enhanced ∼6 times after Mg 2+ ion is co-doped and it is ∼2 times when Li + ion is co-doped. The content in the paper is useful to research new Mn 4+ -doped luminescence materials and improve luminescence property of other Mn 4+ -doped phosphors.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Jiachen Li,Jun Pu,Ziqiang Liu,Jian Wang,Wenlu Wu,Huigang Zhang,Haixia Ma
The energy and power densities of rechargeable batteries urgently need to be increased to meet the ever-increasing demands of consumer electronics and electric vehicles. Alloy anodes are among the most promising candidates for next-generation high-capacity battery materials. However, the high capacities of alloy anodes usually suffer from some serious difficulties related to the volume changes of active materials. Porous supports and nanostructured alloy materials have been explored to address these issues. However, these approaches seemingly increase the active material-based properties and actually decrease the electrode-based capacity because of the oversized pores and heavy mass of mechanical supports. In this study, we developed an ultralight porous nickel to scaffold with high-capacity SnSb alloy anodes. The porous-nickel-supported SnSb alloy demonstrates a high specific capacity and good cyclability for both Li-ion and Na-ion batteries. Its capacity retains 580 mA h g–1 at 2 A g–1 after 100 cycles in Li-ion batteries. For a Na-ion battery, the composite electrode can even deliver a capacity of 275 mA h g–1 at 1 A g–1 after 1000 cycles. This study demonstrates that combining the scaffolding function of ultralight porous nickel and the high capacity of the SnSb alloy can significantly enhance the electrochemical performances of Li/Na-ion batteries.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Zhijiao Liu,Qinqin Jiang,Ronglan Zhang,Ruimin Gao,Jianshe Zhao
ABSTRACT Two new series of binuclear metal phthalocyanines and graphene/phthalocyanine composites (M 2 (PcTN) 2 C(CF 3 ) 2 , M 2 (PcTA) 2 C(CF 3 ) 2 , M 2 (PcTN) 2 C(CF 3 ) 2 -Gr and M 2 (PcTA) 2 C(CF 3 ) 2 -Gr, M = Mn(II), Fe(II), Co(II), Ni(II), Cu(II) and Zn(II)) were synthesized and developed for high efficient catalysts to Li/SOCl 2 battery . All the catalysts were characterized by IR, LRS, SEM , XRD, TEM and TGA . The capacity of the battery containing these catalysts increases by approximately 4.651-83.72% than that of the battery without them. Especially capacity of Fe 2 (PcTA) 2 C(CF 3 ) 2 -Gr could increase by 83.72%. In addition, the catalytic activities between M 2 (PcTN) 2 C(CF 3 ) 2 and M 2 (PcTA) 2 C(CF 3 ) 2 , M 2 (PcTN) 2 C(CF 3 ) 2 and M 2 (PcTN) 2 C(CF 3 ) 2 -Gr, M 2 (PcTA) 2 C(CF 3 ) 2 and M 2 (PcTA) 2 C(CF 3 ) 2 -Gr, M 2 (PcTN) 2 C(CF 3 ) 2 -Gr and M 2 (PcTA) 2 C(CF 3 ) 2 -Gr were made a comparison. The results indicated that activities of the catalysts were related to both the phthalocyanines rings and the conjugative effect. According to the relevant CV results, reasonable catalytic mechanisms were confirmed to explain the catalytic process.
✓ 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）