CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Chenbin Tang,Bangshuai Wei,Wu Tang,Yan Hong,Meichen Guo,Xuesong He,Jiahui Hu,Shan Jia,Cong Fan
A novel small organic molecule namely N,N’-bis(2-anthraquinone)-dihydrophenazine (DAQ-DPZ, 270 mAh/g) with n-p-n molecular heterojunction configuration is designed as the bipolar electrode material for Li-dual-ion batteries. To delay the dissolution for small-molecule organic electrodes, DAQ-DPZ is further coated by a protective carbon layer (DAQ-DPZ@C) through the process called surface self-carbonization. As expected, the resulting DAQ-DPZ@C can show the peak discharge capacity of 269 mAh/g and high median potential of 2.62 V in 1.6–4.4 V (vs. Li + /Li), corresponding to the peak energy density of 704 Wh kg −1 in Li-dual-ion half cells. Furthermore, DAQ-DPZ@C in the symmetric Li-dual-ion batteries can deliver the peak discharge capacity of 88 mAh/g cathode and the peak energy density of 113 Wh kg -1 cathode , stably running for over 5000 cycles. To the best of our knowledge, these results are the top ones for small-molecule organic bipolar electrodes in the symmetric Li-dual-ion batteries.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2023
·
IF 7
Lei Ma,Qiuyan Bi,Wanji Zhou,Xingliang Liu,Fuju Qi,Hao Zhang,Yifan Gao,Shiai Xu
Nanofiltration (NF) membrane with high selectivity and permeance is important for recovering lithium from salt lake brine. In this work, sandwich-like NF membranes were prepared using polyamide (PA) as the interfacial polymerization (IP) layer, dopamine (DA) and zwitterion-g-C 3 N 4 as the composite interlayer and polyethersulfone (PES) ultrafiltration (UF) membrane as the substrate. Three NF membranes were prepared with different zwitterion-g-C 3 N 4 : M3 membrane modified with C 5 H 12 ClNO 2 -g-C 3 N 4 , M4 membrane modified with C 12 H 24 N 2 O 4 S-g-C 3 N 4 and M5 membrane modified with C 19 H 39 NO 2 -g-C 3 N 4 , and their physical and chemical properties, separation capacity, and antifouling behaviour were analyzed. The zwitterion-g-C 3 N 4 composite interlayer improves the hydrophilicity and pore structure of NF membranes. The water contact angle (CA) of M5 membrane is 25.5°and its pore size is 0.49 nm. M5 membrane shows a high retention rate of 96.66 % for Mg 2+ in mixed salt solution (Mg 2+ /Li + = 84) and performs well in salt lake brine with a rejection of 97.90 % to Mg 2+ . The flux recovery ratio (FRR) can be kept above 93 %. This study may give ideas for the preparation of composite NF membrane for water softening and lithium utilization.
✓ 已验证
产品关联
DOI
高影响因子
CHINESE CHEMICAL LETTERS
·
2023
·
IF 9.1
Zhenqiang Guo,Huicong Yang,Qian Wei,Shengjun Xu,Guangjian Hu,Shuo Bai,Feng Li
ABSTRACT Sulfurized polyacrylonitrile (SPAN) is proposed as a promising cathode material for lithium sulfur batteries. However, the continuous side reactions at the electrolyte-electrode interfaces as well as the slow redox kinetics of SPAN cathode deteriorate the electrochemical performance. In this study, an electrolyte with dual-additives comprising 2-fluoropyridine (2-FP) and lithium difluorobis (oxalato) phosphate (LiDFBOP) was used to improve the performance of Li||SPAN cells. 2-FP has a lower lowest occupied molecular orbital energy than that of the solvents in the electrolyte, leading to its prior reduction. A LiF-rich film can be formed on the electrode, effectively improving the stability of the electrolyte-electrode interfaces and prolonging the life. Simultaneously, LiDFBOP could form an electrolyte-electrode interface film containing a large amount of Li x PO y F z species, compensating for the kinetic deterioration caused by the lower ionic conductive of LiF formed at the electrolyte-electrode interface. Hence, an electrode-interface film with good chemical stability and high Li + transport was established by LiF and Li x PO y F z -rich species. The Li||SPAN cell with the electrolyte containing dual-additives demonstrates an excellent capacity retention of 97.5% after 200 cycles at 1.0 C, 25 °C, comparing to 56.2% capacity retention without additives. Moreover, the rate capacities of cells with dual-additives can reach 1128.1 mAh/g at 5 C, comparing to only 813.5 mAh/g using electrolyte without additives. Our results shown that the dual-additives in electrolyte provide a promising strategy for practical application of lithium sulfur batteries with SPAN cathodes.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materiomics
·
2023
·
IF 9.4
Hongzhi Peng,Zhong Xu,Yunjie Zhou,Junfeng Huang,Tao Yang,Jieling Zhang,Yong Ao,Yanting Xie,Hanyu He,Xiong Zhang,Weiqing Yang,Haitao Zhang
Polymer solid-state electrolytes (PSSEs) are promising for solving the safety problem of Lithium (Li) metal batteries (LMBs). However, PSSEs with low modulus in nature are prone to be penetrated by lithium dendrites, resulting in short circuit of LMBs. Here, we design and prepare piezoelectric BaTiO 3 doped polyacrylonitrile (PAN@BTO) quasi-solid-state electrolytes (PQSSEs) by electrostatic spinning method to suppress dendritic growth. The piezoelectric polymer electrolytes are squeezed by nucleation and growth processes of Li dendrites, which can generate a piezoelectric electric field to regulate the deposition of Li + ions and eliminate lithium bud. Consequently, piezoelectric PAN@BTO PQSSEs enables highly stable Li plating/stripping cycling for over 2 000 h at 0.15 mA/cm 2 at room temperature (RT, 25 °C). Also, LiFePO 4 |PAN@BTO|Li full cells demonstrate excellent cycle performance (136.9 mA·h/g and 78% retention after 600 cycles at 0.5 C) at RT. Moreover, LiFePO 4 |PAN@BTO|Li battery show extremely high safety and can still work normally under high-speed impact (2 Hz, ∼30 kPa). We construct an in-situ cell monitoring system and disclose that the mechanism of suppressed lithium dendrite is originated from the generation of opposite piezoelectric potential and the feedback speed of intermittent piezoelectric potential signals is extremely fast.
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2023
·Vol. 19
·期 33
·2301498
·
IF 13.3
Ting Zhu,Sheng Wang,Zhiqian Yu,Hucheng Song,Jun Xu,Kunji Chen
Lithium-carbon dioxide (Li-CO 2 ) batteries have attracted much attention due to their high theoretical energy density. However, due to the existance of lithium carbonate and amorphous carbon in the discharge products that are difficult to decompose, the battery shows low coulombic efficiency and poor cycle performance. Here, by adjusting the adsorption of carbon dioxide (CO 2 ) on ruthenium (Ru) catalysts surface, this work reports an ultralow charge overpotential and long cycle life Li-CO 2 battery that consists of typical lithium metal, ternary molten salt electrolyte (TMSE), and Ru-based cathode. Experimental results show that the Ru catalysts deposited on quartz nanofiber (QF) can suppress the four-electron conversion of CO 2 to lithium carbonate (Li 2 CO 3 ). As a result, the battery shows a long-cycle-life of over 457 cycles at 1.0 A g −1 with a limited capacity of 500 mAh g −1 Ru . Remarkably, a recorded low discharge potential of ≈3.0 V has been achieved after 35 cycles at 0.5 A g −1 , with a charge potential retention of over 99%. Moreover, the battery can operate over 25 A g −1 and recover 96% potential. This battery technology paves the way for designing high-performance rechargeable Li-CO 2 batteries with carbon neutrality.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW CARBON MATERIALS
·
2023
·
IF 5.7
Jing-yi Niu,De-qi Jing,Xing-hua Zhang,Wei-guo Su,Shou-chun Zhang
Hollow porous carbon fibers for Li-S battery electrodes were prepared by the KOH activation of carbon prepared from hollow polyacrylonitrile fibers. The fibers had a high specific surface area of 2 491 m 2 ·g −1 , a large pore volume of 1.22 cm 3 ·g −1 and an initial specific capacity of 330 mAh·g −1 at a current density of 1 C. To improve their electrochemical performance, the fibers were modified by treatment with hydrazine hydrate to prepare nitrogen-doped hollow porous carbon fibers with a specific surface area of 1 690 m 2 ·g −1 , a pore volume of 0.84 cm 3 ·g −1 and a high nitrogen content of 8.81 at%. Because of the increased polarity and adsorption capacity produced by the nitrogen doping, the initial specific capacity of the fibers was increased to 420 mAh·g −1 at a current density of 1 C.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Quan Li,Yahui Liu,Yunling Jia,Yanhong Ji,Feng Yan,Jianxin Li,Younas Mohammad,Benqiao He
Constructing a suitable charged surface layer of nanofiltration (NF) membrane is one of the key challenges to achieve efficient Li + /Mg 2+ separation performance with high Mg 2+ /Li + mass ratio ( W Mg2+/Li+ ). Herein, we proposed a facile route, i.e., grafting the short chain amino-rich monomers (SCA, H(NHCH 2 CH 2 ) 1-4 -NH 2 ) instead of conventional amino-rich macro-monomers (ARM), to construct a separation layer with uniform positive charge on the surface of pristine polyamide (PA) NF membrane to achieve effective Li + /Mg 2+ separation. The SCA grafted NF membrane (PA-g-SCA) retained a more uniform distribution of positively charged groups on the PA layer compared with ARM grafted NF membrane. The SCA grafted NF membrane exhibited a high rejection of Mg 2+ and high permeation of Li + at the same time, leading to an extremely high separation factor for Li + /Mg 2+ of 130 even in the W Mg2+/Li+ of 200:1 in the feed, which greatly surpassed those reported. The pure water flux was 1.8 folds than that of the pristine NF membrane due to the hydrophilicity improvement. The results suggested that the distribution uniformity of positive charges could be the key to efficient Li + /Mg 2+ separation of the NF membrane. Our study provided a facile and robust route to design and construct high Li + /Mg 2+ separation performance NF membranes.
✓ 已验证
产品关联
DOI
高影响因子
Nano Research
·
2019
·Vol. 12
·期 10
·2543-2548
·
IF 8.515
Wang Rui,Zhang Xuejing,Cai Yichao,Nian Qingshun,Tao Zhanliang,Chen Jun
The rechargeable Li-CO 2 battery has been receiving significant attention owing to its merits of high energy density and the efficient utilization of CO 2 . However, the widely application is plagued by severe security risks, such as leakage, flammability and lithium dendrites growth due to the use of liquid organic electrolytes. Here, a composite solid state electrolyte consisting of polyethylene oxide (PEO) and 20 wt.% Li 7 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) was prepared and first introduced into Li-CO 2 battery to solve the problems. The composite solid state electrolyte exhibited high ionic conductivity (1.03 × 10 −1 S·cm −1 at 70 °C), wide electrochemical window (5 V vs. Li + /Li), good mechanical properties and excellent flexibility. Ultimately, the Li symmetric cell with PEO/LLZTO composite solid state electrolyte can operate 1,500 h at a current density of 0.1 mA·cm −2 . The assembled all-solid-state Li-CO 2 battery behaved a long cycle life of 70 cycles at a current density of 100 mA·g −1 with fixed capacity of 1,000 mAh·g −1 . Our work provides new perspective to develop rechargeable all-solid-state Li-CO 2 batteries.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Yinglin Yan,Mangmang Shi,Yiming Zou,Yiqi Wei,Liping Chen,Chaojiang Fan,Rong Yang,Yunhua Xu
It had been proven that carbon aerogel (CA) can effectively improve the conductivity of sulfur (S) and suppress the shuttle effect of polysulfides in Li-S batteries, due to its outstanding electrical conductivity and micropore-rich structure. However, the microstructure of CA was easy to collapse and shrink during carbonization, resulting in a dramatically drop in specific surface area and porosity. Herein, graphene nanosheets (GNs) were introduced in CA to reinforce the structural stability. As-prepared CA/GNs composites were fabricated from in-situ polymerization of resorcinol (R) and formaldehyde (F) in graphene oxide (GO) solution. It was found that the mass concentration of the GO solution had a significantly positive effect on hierarchical porous structure of the CA/GNs composites, which presented improve the electrochemical performances due to the combination of micro-, meso- and macro-pores. It is worth noting that the CA/GNs0.1 sample, obtained from 10 wt % GO solution, possessed the largest specific surface area of 665.477 m 2 g −1 and the largest pore volume of 0.912 cm 3 g −1 . Especially, after incorporated with moderate amount of S (58.86 wt %), the CA/GNs0.1/S cathode exhibited the best electrochemical performances (initial discharging capacity of 1501 mAh g −1 at 0.1C and reversible capacities of 471 mAh g −1 after 100 cycles and 341 mAh g −1 after 500 cycles at 1C). This was attributed to the tunable hierarchical porous microstructure of the CA/GNs0.1 sample. Unfortunately, when increased the S content to 68.39 wt %, the electrochemical performance deteriorated in all aspects because of their sluggish reaction kinetics. These all results suggested that introducing GNs can feasibly enhance the performance of CA as matrix in Li-S batteries.
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Jiaona Shi,Qi Kang,Yan Mi,Qingquan Xiao
Lithium-sulfur (Li–S) batteries have attracted extensive attention in the past decades owing to their high theoretical energy density, low-cost and eco-friendliness. However, poorly cycling stability and rapidly decay caused by shuttle effects at high-sulfur loading condition restrain their practical applications. Focusing on these issues, N-doped hollow porous carbon nanotubes (N-HPCNT) as a self-supporting sulfur cathode is developed. The inherent conductivity and abundant pores of 3D continuous framework not only allow a high-sulfur content (67 wt%) and block the polysulfides via physical confinement, but also trap the polysulfides by the nitrogen heteroatoms (4.60 wt%) via strong chemisorption . Benefiting from the above-mentioned merits, the self-supporting S/N-HPCNT cathode with 3 mg cm −2 sulfur delivers high reversible capacity, super rate capability (1152 and 852.8 mAh g −1 at 0.2 and 3 C, respectively) and long cycling stability (717.9 mAh g −1 after 500 cycles at 1 C). Even under a higher sulfur loading (8 mg cm −2 ), it still exhibits a stable areal capacity of 7.72 mAh cm −2 (corresponding to 965.1 mAh g −1 ) after 60 cycles. This work provides a pathway for developing high performance Li–S batteries.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2018
·
IF 6.945
Yuanyuan Tian,Min Chen,Shida Xue,Youxuan Cai,Qiming Huang,Xiang Liu,Weishan Li
This report unravels the dependence of the microstructure and electrochemical performances of Li-rich layered transition metal oxide (LLMO) on the molecular structure of polymer templates for the formation of oxalate precursor. A representative LLMO, Li 1.2 Mn 0.54 Ni 0.13 Co 0.13 , is synthesized by co-precipitation method, and three samples, LLMO-PVP, LLMO-PEG and LLMO-PVA, are obtained with polymer templates, polyvinyl pyrrolidone (PVP), polyethyleneglycol (PEG) and polyvinyl alcohol (PVA), respectively. The physical and chemical properties of the resulting products are analyzed with SEM, TEM , XRD , BET, ICP , and XPS , and their electrochemical performances as cathode of Li-ion battery are evaluated with EIS , GITT and charge/discharge tests. It is found that LLMO-PVP exhibits the best performances, followed by LLMO-PEG, while LLMO-PVA behaves poorest. This difference is ascribed to the various microstructures of the resulting products, which are determined by the molecular structure of polymer templates.
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2019
·
IF 15.548
Shu-qi Yang,Peng-bo Wang,Han-xin Wei,Lin-bo Tang,Xia-hui Zhang,Zhen-jiang He,Yun-jiao Li,Hui Tong,Jun-chao Zheng
Li-rich Mn-based cathode materials are regarded as promising cathode materials for Li-ion batteries (LIBs) owing to their high electrochemical capacity and low cost. However, residual Li compounds on the surface and dissolution of metal ions cause severe degradation of the electrochemical performance, thereby hindering their practical applications. Li 4 V 2 Mn(PO 4 ) 4 is a composite cathode material with three-dimensional Li-ion diffusion channels and a stable structure at high operating voltages (>4.5 V). Herein, we modify the surface of Li[Li 0.2 Mn 0.54 Ni 0.13 Co 0.13 ]O 2 with Li 4 V 2 Mn(PO 4 ) 4 . The Li 4 V 2 Mn(PO 4 ) 4 coating layer can not only reduce the content of residual Li compounds on the surface but also restrain the dissolution of transition metals. Theoretical calculations illustrate that Li 4 V 2 Mn(PO 4 ) 4 reduces the Li-ion diffusion energy barrier and provides efficient diffusion pathways. Li[Li 0.2 Mn 0.54 Ni 0.13 Co 0.13 ]O 2 @Li 4 V 2 Mn(PO 4 ) 4 compounds deliver a discharge capacity of 300 mAh g −1 with a high initial coulombic efficiency (84.2%) and an excellent cycling stability (capacity retention of 78.1% after 200 cycles at 1C). Hence, the proposed modification strategy of phosphate-based materials could shed light on the structural design of surface-sensitive electrode materials for LIBs.
✓ 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）