ADVANCED MATERIALS
·
2024
·Vol. 36
·期 31
·2404319
·
IF 27.4
Zongqiang Sun,Xiaodong Lin,Chutao Wang,Yanyan Tan,Wenjie Dou,Ajuan Hu,Jiaqing Cui,Jingmin Fan,Ruming Yuan,Mingsen Zheng,Quanfeng Dong
Lithium–oxygen (Li–O 2 ) batteries, renowned for their high theoretical energy density, have garnered significant interest as prime candidates for future electric device development. However, their actual capacity is often unsatisfactory due to the passivation of active sites by solid-phase discharge products. Optimizing the growth and storage of these products is a crucial step in advancing Li–O 2 batteries. Here, a fluorine-doped bimetallic cobalt-nickel oxide (CoNiO 2– x F x /CC) with an interlaced catalytic surface (ICS) and a corncob-like structure is proposed as an oxygen electrode. Unlike conventional oxide electrodes with a “single adsorption catalytic mechanism,” the ICS of CoNiO 2− x F x /CC offers a “competitive adsorption catalytic mechanism,” where oxygen sites facilitate oxygen conversion while fluorine sites contribute to the growth of Li 2 O 2 . This results in a change in Li 2 O 2 morphology from a surface film to toroidal particles, effectively preventing the burial of active sites. Additionally, the unique open architecture aids in the capture and release of oxygen and the formation of well-contacted Li 2 O 2 /electrode interfaces, which benefits the complete decomposition of Li 2 O 2 products. Consequently, the Li–O 2 battery with a CoNiO 2− x F x /CC cathode demonstrates a high specific capacity of up to 30923 mAh g −1 and a lifespan exceeding 580 cycles, surpassing most reported metal oxide-based cathodes.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Qingfen Zhang,Hongjin Tan,Fenglong Lin,Wayne Hsu,Shenglong Wang,Yincai Wu,Huihui Wang,Bangmin Li,Lijun Song
Silicon suboxide (SiOx) has been the subject of considerable research interest owing to its promising theoretical specific capacity and lower volume expansion compared with nano-silicon. However, improving its rate and cycling performance is crucial for practical applications. In this study, we propose a novel composite anode material of nano-SiOx encapsulated in a two-dimensional (2D) nitrogen and phosphorous (N/P) co-doped graphene-like nanosheet structure. In half-cell tests, the electrode with this active material exhibited a reversible capacity of 543.0 mA h g−1 at 400 mA g−1 after 100 cycles and 386.4 mA h g−1 at 1600 mA g−1, an improvement of two orders of magnitude compared with pristine micron-SiOx. A thorough study revealed that this excellent battery rate performance and capacity retention primarily resulted from the role played by the N/P co-doped 2D graphene-like framework, which not only effectively promoted the kinetics of ionic and electronic migration but also likely reduced the interfacial parasitic reactions in the electrolyte and mitigated volume expansion by forming a “caged” framework over nano-SiOx. Thus, this work demonstrates a simple and feasible method for the preparation of high-performance anode materials, offering a promising strategy to address the challenges of volume expansion and sluggish kinetics in SiOx-based anodes for lithium-ion batteries.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Shu Huang,Min Zhou,Kangli Wang,Shijie Cheng,Guoping Yan,Kai Jiang
Electrochemical synthesis method is an effective, controllable and cost-effective synthesis route for fabricating various kinds of metal compounds. Here, for the first time, we synthesis the Li-Mo-O compounds by electrolysing MoO 3 in molten LiCl-LiBr salt at 600 °C. The as-prepared LiMoO 2 and Li 2 MoO 4 were evaluated as novel anode materials for lithium ion batteries (LIBs), delivering high reversible capacities of 565 and 473 mAh g −1 , respectively. More significantly, the LiMoO 2 @C show extra high initial columbic efficiency of 80% with superior rate capability and long cycling stability over 200 cycles. This facile and green electrochemical synthesis route described in this work can provide new insights for the development of promising host materials for practical LIBs in large-scale energy storage applications.
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
Tao Li,Xue Bai,Yong-Xin Qi,Ning Lun,Yu-Jun Bai
Fe 3 O 4 has been regarded as one of the sustainable alternatives for anode materials of Li-ion batteries (LIBs), but the severe volume expansion and agglomeration of Fe 3 O 4 nanoparticles pose limitations to the lithium storage capability. In this paper, Fe 3 O 4 nanoparticles are loaded on the carbon derived from inner pomelo pericarp to form Fe 3 O 4 /C composite. Benefiting from the synergistic effect of the good electronic conductivity of the biochar and the high capacity of Fe 3 O 4 nanoparticles, the composite delivers a pronounced reversible capacity of 1003.3 mAh g −1 after 200 cycles at 100 mA g −1 , and reveals an impressive high rate capacity of 634.6 mAh g −1 at 500 mA g −1 with the capacity fading of 0.074% per cycle, suggesting the great potential as anode materials for LIBs. The mineral substances of uniformly distributed KCl and CaCO 3 in the biochar play an important role in enhancing the electrochemical performance of the composite.
✓ 已验证
产品关联
DOI
高影响因子
SOLID STATE IONICS
·
2016
·
IF 2.38
Guofeng Xu,Qingrui Xue,Jianling Li,Zhanyu Li,Xinping Li,Tianheng Yu,Jiguang Li,Xindong Wang,Feiyu Kang
Lithium-excess layered cathode materials Li[Li 0.2 Mn 0.54 − x Sm x Co 0.13 Ni 0.13 ]O 2 (x = 0, 0.01, 0.03, 0.05) with different quantities of Sm were synthesized by the coprecipitation-calcination method. The rare earth element samarium (Sm) was introduced into the structure of Li[Li 0.2 Mn 0.54 Co 0.13 Ni 0.13 ]O 2 as the replacement at Mn sites. The refinement unit cell parameters from the X-ray powder diffraction patterns illustrate the doping of Sm facilitates enlarging the lithium ions diffusion passageway space of the Li[Li 0 . 2 Mn 0.54 Co 0 . 13 Ni 0.13 ]O 2 structure. The Li[Li 0.2 Mn 0.51 Sm 0.03 Co 0.13 Ni 0.13 ]O 2 electrode presented the best electrochemistry properties. The initial discharge capacity is 287.5 mAh g − 1 and the initial coulombic efficiency increases from 81.31% to 85.34% with a constant current density of 12.5 mA g − 1 , which can be attributed to the suppression of the oxygen release from the structure at the initial charge-discharge process. The Li[Li 0·2 Mn 0.51 Sm 0.03 Co 0.13 Ni 0.13 ]O 2 electrode delivers 236.1 mAh g − 1 after 40 cycles and the capacity retention ratio is 82.12% while only 206.8 mAh g − 1 and 70.85% are obtained after 40 times of cycling for the pristine electrode. The Nyquist plots indicate that the electrical conductivity and interfacial electrochemical reaction activity increase as well.
✓ 已验证
产品关联
DOI
高影响因子
OPTIK
·
2016
·
IF 0.742
Renping Cao,Dedong Peng,Haidong Xu,Zhiyang Luo,Hui Ao,Siling Guo,Jingwei Fu
Sr 3 (VO 4 ) 2 :Eu 3+ and Sr 3 (VO 4 ) 2 :Eu 3+ , Li + phosphors are synthesized by solid-state reaction method in air. X-ray diffraction patterns indicate that all samples are pure phase Sr 3 (VO 4 ) 2 . The host Sr 3 (VO 4 ) 2 with excitation 348 nm emits yellow-green light. Emission spectrum of Sr 3 (VO 4 ) 2 :Eu 3+ phosphor with excitation 335 nm contains a broad emission band peaking at ∼540 nm due to V 5+ → O 2− charge transfer and some narrow emission bands owing to the 4 f – 4 f electron transations of Eu 3+ ion in the range of 400–780 nm. With excitation 394 nm, only emision bands derived from Eu 3+ ion are observed. Emission intensity of Sr 3 (VO 4 ) 2 :Eu 3+ phosphor can be improved obviously due to charge compensation and fluxing agent role of Li + ion when Li + ion is co-doped. The optimal Eu 3+ doping concentration is ∼5 mol%. The energy transfer process between [VO 4 ] 3− group and Eu 3+ ion is observed and analyzed by emission spectrum in Sr 3 (VO 4 ) 2 :Eu 3+ phosphor. The luminous mechanism of Sr 3 (VO 4 ) 2 :Eu 3+ phosphor is explained by energy transfer and energy level diagram of [VO 4 ] 3− group and Eu 3+ ion.
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2013
·Vol. 5
·期 16
·7564-7571
·
IF 6.233
Jie Sun,Haimei Liu,Xu Chen,David G. Evans,Wensheng Yang
Superposed cobalt(II)–cobalt(III) layered double hydroxide (CoII–CoIII-LDH) nanoplates were synthesized by an oil droplet template method, in which the main steps are as follows: LDH nanosheets were first assembled on an oil droplet template to form a multishell sphere, and then the oil droplet was easily removed under centrifugal force due to its very different density from that of the assembled LDH shell. This resulted in the multishell spheres being split open to create superposed LDH nanoplates. The resulting material has a three-stage architecture, namely, the primary building blocks of nanosheets, the secondary architecture of shells derived from the nanosheets, and the long-range architecture of superposed nanoplates assembled from the vertically stacked shells. Most importantly, the as-fabricated LDH-based hierarchical structure can be readily converted to a Co3O4/C composite via calcination, without obvious structural alteration, where the residual surfactant is the source of the carbon. When used as an anode material for Li-ion batteries, the Co3O4/C electrode exhibits an excellent electrochemical performance, which is attributed to the unique hierarchically porous structure.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2015
·Vol. 20
·期 1
·1-8
·
IF 2.446
Zhong Haoxiang,Sun Minghao,Li Yong,He Jiarong,Yang Jianwen,Zhang Lingzhi
The polyacrylic latex (LA132) was firstly reported as a water-soluble binder for LiNi 1/3 Co 1/3 Mn 1/3 O 2 (NCM) cathode in Li-ion battery. The electrochemical performances of NCM cathode with LA132 binder were investigated and compared with the conventional water-soluble sodium carboxymethyl cellulose (CMC) and commercial non-aqueous polyvinylidene difluoride (PVDF). NCM cathode with LA132 binder exhibited a much higher specific capacity of 146 mAh g −1 and capacity retention of 96.4 % after 100 cycles as compared with 122 mAh g −1 /88 % and 121 mAh g −1 /75% for the NCM electrode with CMC and PVDF, respectively. In addition, NCM cathode with LA132 binder exhibited better rate capability than that of CMC and PVDF, e.g., retaining 34.3 % capacity of C/5 at 5 C rate as compared with 28.5 and 10.9 % for CMC and PVDF, respectively.
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Biyi Xu,Bing Huang,Hezhou Liu,Huanan Duan,Shengwen Zhong,Chang-An Wang
Cubic perovskite–type oxide Li 3/8 Sr 7/16 Hf 1/4 Ta 3/4 O 3 (LSHT) is a promising solid electrolyte material for next–generation Li–ion batteries such as all–solid–state Li batteries and Li–redox flow batteries due to its high room–temperature Li–ion conductivity and good chemical compatibility with commercial organic liquid electrolyte. High relative density is another important requirement for these applications. Here we investigate the influence of sintering additives (Li 3 BO 3 , Li 4 SiO 4 , LiF) on the density, the total Li–ion conductivity, the interfacial conductivity against commercial liquid electrolyte, and the cycling performance of the hybrid Li-ion cells. The results show that comparing with other additives, LSHT sintered with 2 wt% LiF shows the highest Li–ion conductivity (3.3 × 10 −4 S cm −1 ) and the smallest interfacial resistance (125 Ω cm 2 ) against organic electrolyte at room temperature; Li/LiFePO 4 batteries with LSHT pellets fired with 2 wt% LiF have the best cyclability and the highest coulombic efficiency (99.6 ± 0.04%) in 50 cycles.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Tong Wen,Yunliang Zhao,Bowen Kuang,Yupeng Sun,Ying Li,Huatao Wang,Licai Chen,Renbo Gao,Lingjie Zhang,Tingting Zhang
The novel two-dimensional (2D) channel membranes have great potential for effective Li + /Mg 2+ separation due to the rapid ion transport and precise adjustment of their channels. However, the solution composition greatly affects the control of channel height, resulting in an unsatisfactory selectivity performance. Herein, the 2D montmorillonite membranes are used to understand the causes of channel instability and explore the effective solutions. It is found that the changes in solution component can enlarge the channel height by changing the cross-linking constraint of Fe 3+ between MMT nanosheets, thus leading to a weak sieving effect. To improve the channel constraint and its Li + /Mg 2+ separation, the end face and interfacial layer constraint of nanosheets are proposed. As an effective strategy to strengthen the constraint effect, glutathione can modify the end faces of nanosheets and enhance the mutual binding force between them through its oxidative transformation. Besides, the construction of an interfacial layer can also limit channel swelling by altering the membrane hydration and wetting. These strategies will also form a synergistic regulatory effect. Consequently, a superior membrane is obtained and presents an improved selectivity of 8.89 at 100:1 Mg 2+ /Li + ratio. These innovative approaches offer a valuable framework for creating high-performance 2D channel membranes, which can also support their wider application in the Li + /Mg 2+ separation.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Ning Zhang,Yuan Li,Wei Zhang,Yanling Liu,Yongjian Pei,Jie Zhao,Ping Ning,Kai Li
The effective and sustainable separation and recovery of monovalent and divalent metal ions from spent lithium-ion batteries after acid/alkali leaching still remains a big challenge to hydrometallurgical technologies. In this work, we prepared a novel crown ether-ionic liquid functionalized membrane for the selective separation of mono/divalent ions using electrodialysis (ED). a novel membrane was designed by incorporating 15-crown ether-5 (15C5), a crown ether with specific recognition for alkali metal ions, through combining interfacial polymerization and self-assembly techniques into the tunable ionic liquid 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C4mim][NTf2]). The resultant hybrid coating forms a channel structure for the selective transport of monovalent ions. Systematic characterisations on membrane structure, physicochemical properties, and electrochemical performance were performed before and after modification. The ion transport mechanism was performed using ion diffusion mathematical modeling and density functional theory. The designed crown ether ionic liquid functionalized modified membrane 15C5-IL(2)/Cu-MPD showed excellent selectivity for various monovalent/divalent ion pairs of Li+/Mg2+, Na+/Mg2+, and K+/Mg2+ with the values of 5.33, 5.45, and 13.39, respectively. Besides, the membrane was pH-responsive, and it showed a selectivity of Li⁺/Mg²⁺ at 10.45 in the case of pH 7.5. This may be due to the synergistic effect of pore size screening brought about by the distribution of modified components and specific interactions, for instance 15C5/O--Li+. This simple approach opens a new avenue in the quest for selective IEMs for separations of certain cations by ED.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Yue Chen,Shaohua Zhang,Dongni Zhao,Zhixian You,Yubiao Niu,Liqiang Zeng,Nagarathinam Mangayarkarasi,Oleg V. Kolosov,Jianming Tao,Jiaxin Li,Yingbin Lin,Yongping Zheng,Long Zhang,Zhigao Huang
The widespread application of Li 4 Ti 5 O 12 (LTO) anode in lithium-ion batteries has been hindered by its relatively low energy density. In this study, we investigated the capacity enhancement mechanism of LTO anode through the incorporation of Na + cations in an Li + -based electrolyte (dual-cation electrolyte). LTO thin film electrodes were prepared as conductive additive-free and binder-free model electrodes. Electrochemical performance assessments revealed that the dual-cation electrolyte boosts the reversible capacity of the LTO thin film electrode, attributable to the additional pseudocapacitance and intercalation of Na + into the LTO lattice. Operando Raman spectroscopy validated the insertion of Li + /Na + cations into the LTO thin film electrode, and the cation migration kinetics were confirmed by ab initio molecular dynamic (AIMD) simulation and electrochemical impedance spectroscopy, which revealed that the incorporation of Na + reduces the activation energy of cation diffusion within the LTO lattice and improves the rate performance of LTO thin film electrodes in the dual-cation electrolyte. Furthermore, the interfacial charge transfer resistance in the dual-cation electrolyte, associated with ion de-solvation processes and traversal of the cations in the solid-electrolyte interphase (SEI) layer, are evaluated using the distribution of relaxation time, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. Our approach of performance enhancement using dual-cation electrolytes can be extrapolated to other battery electrodes with sodium/lithium storage capabilities, presenting a novel avenue for the performance enhancement of lithium/sodium-ion batteries.
CAS / MDL:
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）