Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 42
·22584-22591
·
IF 14.511
Xiaoying Song,Min Wang,Sheng Wang,Zhu Cheng,Ting Zhang,Ting Zhu,Hucheng Song,Linwei Yu,Jun Xu,Kunji Chen
Solid-sate lithium-ion batteries (LIBs), especially lithium–sulfur (Li–S) batteries, are one of the most promising candidates for developing high energy density and high safety energy storage devices. However, current solid-state Li–S batteries can only work well at a relatively high operating temperature (>50 °C) due to the poor Li-ion transfer kinetics at electrodes/electrolyte and their interfaces which make these batteries lose most of their capacity and power as the temperature falls below room temperature. Here, we report an extra-wide operating temperature solid-state Li–S battery that can efficiently harvest omnidirectional solar energy and convert it into heat via a hierarchical copper–silicon nanowire photothermal current collector. Such a current collector enables broad solar spectrum absorption (>93%) with a wide incident angle (0 degree to 70 degree) and efficient conversion of light-to-heat, improving charge storage and transmission at electrodes/electrolyte and their interfaces even at low operating temperatures. As a result, the battery demonstrates low impedance (∼102 Ω cm2), a high discharge capacity of ∼900 mA h g−1 at room temperature, ∼960 mA h g−1 at 60 °C and a discharge capacity of ∼260 mA h g−1 at −60 °C. Such a design provides an effective solution for all-solid-state LIBs operating at a low temperature.
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Kangning Gao,Minghui He,Yiqiu Li,Yipeng Zhang,Jun Gao,Xixiang Li,Zhonghui Cui,Zhongliang Zhan,Tao Zhang
Garnet electrolyte is a promising candidate for the development of all-solid-state Li-metal batteries, because of its safety and stability against Li metal. However, its practical application is limited by the difficulty in production of its high-density thin sheet. In this work, we have fabricated garnet thin sheet electrolytes (Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 , LLZTO) by tape-casting technique. By using Li 2 O as a liquid-phase sintering additive, a high relative density up to 99% was achieved. Electrochemical results show the LLZTO sheets have an ionic conductivity of 5.2 × 10 −4 S cm −1 at 30 °C and good cycling stability against Li metal. Based on the sheets, all-solid-state Li/LLZTO/LiFePO 4 batteries exhibit excellent reversible cycles at 60 °C and 0.1C with an initial discharge specific capacity of 125.8 mA h g −1 and a retention of 92.3% after 50 cycles. These results indicate that the tape-casting process demonstrated here provides an effective method of producing high-density garnet thin sheet electrolytes for high-performance all-solid-state Li-metal batteries.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Zhihua Zhang,Xiao Du,Zheng Zhang,Qinglong Luo,Zhonglin Zhang,Jun Li,Xiaogang Hao
Because of its excellent stabilities, polyvinylidene fluoride (PVDF) is commonly employed as a binder in electrode fabrication. However, poor adhesion and hydrophilicity limit its applicability. Herein, PVDF as the hydrophobic framework, polyacrylic acid (PAA), and carboxymethylcellulose lithium (CMCLi) composite binders were cross-linked with phytic acid and Li 1-x Mn 2 O 4 /C were used in the formulation. After 100 electrochemical cycles, the film electrode Li 1-x Mn 2 O 4 /C/PAA- c -CMCLi- b -PVDF exhibits excellent adhesion (0.93 N cm −1 ) and a low capacity fading rate (8.2 %). Furthermore, this film electrode demonstrated a high intercalation capacity (32.14 mg g −1 ), a short intercalation equilibrium time (within 2 h), and a fast Li + intercalation rate, which can be attributed to the synergistic effect of electrolyte permeability enhanced by hydrophilic functional groups (–OH and –COOH), dispersibility of electrode material particles improved by high slurry rheology, and the high transport efficiency of –COOH for Li + . These promising results suggest that this double cross-linked Li 1-x Mn 2 O 4 /C/PAA- c -CMCLi- b -PVDF film electrode is suitable for the selective extraction of Li + .
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高影响因子
Small
·
2021
·Vol. 17
·期 47
·2103778
·
IF 13.281
Huajin He,Ying Liao,Wenhua Zuo,Guochang Li,Jiabao Gu,Yixiao Li,Zheng Hu,Yong Yang
Reducing SF 6 (as gas cathode) in Li batteries is a promising concept for the double benefit of mildly converting greenhouse SF 6 and providing a high theoretical energy density of 3922 Wh kg −1 . However, the reduction process is hampered by its sluggish kinetics. Here, cobalt phthalocyanine (CoPc) molecules immobilized on porous carbon matrix are, for the first time, introduced to the Li SF 6 chemistry to deliver an enhanced energy density. It is revealed that the high redox potential of Co(II)Pc/[Co(I)Pc] − (≈2.85 V) facilitates the formation of Co(I) N 4 sites to catalyze the SF 6 electrochemical reduction. By using highly porous holey nitrogen-doped carbon nanocages as carbon matrix, the Li SF 6 cells deliver a high discharge voltage of 2.82 V at 50 mA g C+CoPc −1 and an unprecedented areal capacity of 25 mAh cm −2 at 0.1 mA cm −2 , much superior to previous results. This work opens up new possibilities for high-efficiency conversion of SF 6 in lithium batteries.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Jianchuan Liu,Yunbo Zhang,Yao Miao,Ying Yang,Ping Li
The mechanism of lithium ion-sieve adsorbing Li+ ions from brines is based on the Li+/H+ ion exchange, where Li+ ions in brines are adsorbed on ion-sieves to displace H+ ions, and the displaced H+ ions are released in brines in turn. If the released H+ ions are accumulated in brines, then brines become acidic, not conducive to Li+ ions adsorption on ion-sieves. Therefore, it is important to regulate the pH value in brines to be more than 7 during the lithium recovery from brines using ion-sieves. Instead of the addition of the traditional ammonia buffer solution, the alkaline anion exchange resins are used to regulate the pH value of brines in this work since the addition of ammonia buffer solution in brines would cause the secondary pollution in Salt Lake with a high ammonia nitrogen emission value. The alkaline anion exchange resins contain the amine functional groups to neutralize the released H + ions in brines that enhance the adsorption performance of lithium ion-sieves. Like ammonia buffer, the amine functional groups of alkaline resins without more free OH– ions in brine will avoid the precipitation of high content of magnesium in brines. Here, seven kinds of alkaline anion exchange resins are used to neutralize the released H+ ions during lithium recovery from brines using homemade granular titanium-type lithium ion-sieves (PVB-HTO ion-sieves). The process intensification for lithium recovery from brine by lithium ion-sieves with the addition of alkaline anion exchange resins is evaluated based on experimental results, and a green lithium recovery technology from brine with a high Mg/Li ratio will be developed.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Haisong Zhao,Lei Zhang,Hongsen Hui,Hongchang Pei,Xianhui Li
Nanofiltration (NF) membrane with high ion sieving efficiency is desired for Mg 2+ /Li + separation. To achieve this aim, a crown ether functional layer with a high Mg 2+ transportation barrier was constructed by grafting water-soluble diazo-18-crown-6 ether (DA18C6) monomer on the piperazine (PIP)-based polyamide NF membrane surface via secondary interfacial polymerization (SIP). Molecular simulations revealed that the crown ether monomer has a stronger interaction force with Mg 2+ (−355.9 kcal/mol) than Li + (−110.6 kcal/mol) due to its higher bonding energy, thereby reducing the diffusion rate of Mg 2+ . The ion separation experiment showed that the PIP-TMC-DA18C6 (5min) NF membrane demonstrated a better Mg 2+ rejection of 87.7 % compared with the pristine PIP-TMC NF membrane of 76.1 %. Besides, the Li + shows a higher mean square displacement (MSD) value in PIP-TMC-DA18C6 NF membrane than PIP-TMC NF membrane, resulting in a lower Li + rejection of 34.1 %. Furthermore, the PIP-TMC-DA18C6 (5 min) NF membrane also shows an excellent separation factor of 18 under the Mg 2+ /Li + ratio of 50:1. This work demonstrated that the crown ether-based composite NF membrane exhibits a good performance for Mg 2+ /Li + separation.
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产品关联
DOI
高影响因子
Energy Materials
·
2025
·Vol. 5
·期 4
·N
·
IF 11.2
Dongwei Zhou,Guiyang Gao,Zhanlin Yang,Weibin Guo,Liang Lin,Yinggan Zhang,Chengkun Zhang,Saichao Li,Yuanyuan Liu,Baisheng Sa,Guoying Wei,Dong-Liang Peng,Jie Lin,Qingshui Xie
Li-rich Mn-based cathode materials (LRM) have received great attention owing to their high capacity and low cost. However, the mismatch between the widely used carbonate electrolyte and the LRM cathode and lithium metal anode causes a series of problems, such as electrolyte continuous oxidation, cathode structure degradation, and Li dendritic growth. Herein, inorganic oxide B2O3 is introduced as a dual-functional high-voltage electrolyte additive to construct stable cathode electrolyte interphase and solid electrolyte interphase for Li||LRM batteries. The modified interface derived from the additive can induce dendrite-free Li deposition, stabilize cathode structure, and inhibit transition metal dissolution. Moreover, the adverse side reactions are mitigated, thus enhancing Li+ transport rate and reducing interface impedance. With the addition of B2O3 into the carbonate electrolyte, the Li||LRM battery exhibits an enhanced discharge capacity of 221 mAh g-1 after 200 cycles, equaling a capacity retention of 92.1%. When the upper cut-off voltage is increased to 5 V, a superior capacity retention of > 85% can still be achieved after 150 cycles at 1 C. In addition, the low cost of B2O3 benefits for commercial application. This work offers new guidance for the research of low-cost, high-voltage dual-functional additives for advanced lithium metal batteries.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 38
·18019-18024
·
IF 3.591
Jing Ding,Xiangyang Zhou,Chucheng Luo,Juan Yang,Jingjing Tang
FeF3·0.33H2O with a special one-dimension tunnel structure has been considered as a potential cathode material. However, the low electron conductivity of FeF3·0.33H2O prevents its practical application. FeF3·0.33H2O coupled with a carbon material is an effective method to solve the low electric conductivity of FeF3·0.33H2O. Hence, we apply a facile approach using the catalyzed pyrolysis of melamine and a fluorination–annealing process to synthesize the N-doped CNTs/FeF3·0.33H2O composite with a bamboo-like morphology. The as-prepared composite displays a good cycling performance with a reversible discharge capacity of 160.7 mA h g−1 at 40 mA g−1 after 100 cycles and a good rate performance, as well as a good electrochemical performance even at a relatively high mass loading. The good electrochemical properties can be mainly ascribed to the fact that N-doped CNTs play the role of a cross-linked conductive network to provide an electron-transport expressway in the active material. This simple catalyzed pyrolysis and fluorination–annealing approach provides a promising avenue for the application of iron fluoride as a cathode material.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Qiuyan Bi,Chao Zhang,Jiandong Liu,Xingliang Liu,Shiai Xu
A nanofiltration (NF) membrane with positive charges capable of separating Mg 2+ and Li + from high Mg/Li ratio brine was prepared by interfacial polymerization of 1, 4-bis (3-aminopropyl) piperazine (BAPP)/trimesoyl chloride monomers, and then nano graphitic carbon nitride (g-C 3 N 4 ) functionalized with zwitterion (BHC-CN) was introduced into the active layer of the fabricated membrane. Salt permeation and selectivity were improved with the increase of BHC-CN content to 0.02% in BAPP solution. The morphology and surface chemical composition of BHC-CN were detected. The surface Zeta potential test indicates that the membrane fabricated with BHC-CN is positively charged at pH < 7.33. The presence of small aggregates on the surface of the membrane may increase the effective filtering area of the membrane and thus improve the permeability. It also exhibits long-time stability and excellent separation of Mg 2+ and Li + , and the Mg/Li ratio is decreased from 73 in the feed to 1.85 in the permeation. Moreover, the resulted membrane shows good fouling resistance. In conclusion, the membrane has potential advantages in water softening and recovering Li + from brine with high Mg/Li ratio.
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高影响因子
NANO
·
2021
·
IF 1.556
M. M. Xia,J. Li,Y. Y. Zhang,D. N. Kang,Y. L. Zhang
Nanosized TiO 2 has been actively developed as a low-cost and environment-friendly anode material for lithium-ion batteries (LIBs), but its poor electronic conductivity seriously restricts its practical applications. This drawback is addressed in this work by the fabrication of one-dimensional mesoporous graphene@Ag@TiO 2 composite nanofibers as anode materials for high-performance LIBs. The materials were prepared via electrospinning combined with annealing treatment, and the effects of graphene addition on the microstructure and electrochemical performance of the resulting mesoporous graphene@Ag@TiO 2 nanofibers were investigated in detail. Ag@TiO 2 nanofibers with the optimal amount of graphene displayed a maximum initial discharge capacity of 4 9 0 . 5 mAh ⋅ g − 1 at 1 0 0 mA ⋅ g − 1 and retained a discharge capacity of 2 0 9 . 1 mAh ⋅ g − 1 at 1 0 0 mA ⋅ g − 1 after 100 cycles. These results reflect the excellent cycling stability of the material. The average specific discharge capacity of the nanofibers ( 9 7 . 6 mAh ⋅ g − 1 at 1 0 0 0 mA ⋅ g − 1 ) was two-fold higher than that of samples without graphene, and their discharge capacity returned to 2 5 3 . 8 mA ⋅ g − 1 (approximately 9 6 . 2 mA ⋅ g − 1 for other nanofibers) when the current density was recovered to the initial value ( 4 0 mA ⋅ g − 1 ) . Electrochemical impedance spectroscopic measurements confirmed that the conductivity of the electrode was 6 . 3 × 1 0 − 1 S ⋅ cm − 1 , which is higher than that of bare mesoporous Ag@TiO 2 ( 1 . 9 9 × 1 0 − 5 S ⋅ cm − 1 ). Thus, one-dimensional mesoporous graphene@Ag@TiO 2 nanofibers can be regarded as a promising anode material for LIBs.
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高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Xiangyang Zhuang,Yao Zhang,Lingxiao He,Yunfeng Zhu,Qifeng Tian,Xinli Guo,Jian Chen,Liquan Li,Quan Wang,Guanzhou Song,Xiaoxiao Yan
In the present work, the sample of Si nanoparticles embedded in porous C (denoted as Si@porous-C) has been successfully synthesized by using nano-MgO as the pore-former. Observations by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) on Si@porous-C sample reveal that Si nanoparticles homogeneously disperse in porous carbon scaffold. As anode of lithium ion battery (LIB), Si@porous-C preserves a charge-discharge capacity of 1172 mAh g −1 after 40 cycles, possessing enhanced cyclic deterioration of only 0.35% per cycle in comparison with Si nanoparticles and Si nanoparticles embedded in ordinary carbon (denoted as Si@C). It delivers reversible capacities of about 947 mAh g −1 , 670 mAh g −1 , and 394 mAh g −1 in current densities of 1000 mA g −1 , 2000 mA g −1 , and 4000 mA g −1 , respectively, all of which are higher than those of commercial nano-silicon and Si@C. The improved high-rate capability of Si@porous-C could be attributed to a decreased resistance and enhanced infiltration of electrolytic solution around nano-silicon particles. The merits of scalable synthetic process and improved electrochemical properties recommend Si@porous-C as a promising anode material for high performance Li-ion batteries.
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高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 10
·期 2
·740-751
·
IF 12.732
Lichong Peng,Yaxin Sun,Shiquan Guo,Congju Li
Oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) involve proton coupled electron transfer reaction (PCET), resulting in sluggish redox kinetics. At present, the development of high-efficiency bifunctional oxygen electrocatalysts is still a puzzling challenge. Herein, we propose a scalable strategy for embedding and beading ZIF-derived hollow Co–Nx nanocube cage dispersion implanted with porous carbonized nanofibers (EH/PCNFs and BH/PCNFs) through electrospinning and annealing. The cobalt species prevent themselves from agglomerating during the annealing process through the “fence” effect of the non-volatile Zn species, thereby synergizing with ligand volatilization to facilitate the formation of Co–Nx nanocube cages. Benefiting from the ultralong interconnected multi-layered carbon nanofiber matrix, the hollow Co–Nx nanocube cages can change the charge density and electron distribution of the carbon nanofiber matrix, endowing the carbonized nanofiber carrier with special surface polarization and accelerating the electrocatalytic kinetics. Remarkably, the integrated Li–O2 batteries (LOBs) based on BH/PCNFs and EH/PCNFs electrodes exhibit significantly decreased charge/discharge polarization (0.79 V) and a long-term cyclability (147 cycles) under a cut off capacity of 500 mA h g−1 at 200 mA g−1. This work might be beneficial for the practically viable design and manufacture of dual-function oxygen electrocatalysts.
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高影响因子
危险品化学品经营许可证（带存储）