ACS Sustainable Chemistry & Engineering
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2018
·
IF 6.14
Kunlei Zhu,Yufeng Luo,Fei Zhao,Jiwei Hou,Xuewen Wang,He Ma,Hui Wu,Yuegang Zhang,Kaili Jiang,Shoushan Fan,Jiaping Wang,Kai Liu
Flexible and durable electrode materials are of vital importance to developing advanced energy storage devices for emerging wearable electronics. Most current strategies adopt chemical modifications or chemical binders to improve the interface interaction between flexible components, which inevitably lowers the cyclic lifetime and increases the production cost. Here, we report an in situ, scalable sol–gel method to fabricate free-standing TiO2/superaligned carbon nanotube (SACNT) hybrid films as flexible anodes in Li-ion batteries. The natural and desirable wettability between TiO2 and SACNTs makes any chemical modifications or chemical binders unnecessary in the fabrication process, delivering a clean TiO2–SACNT interface. The as-prepared TiO2/SACNT anodes not only inherit the high flexibility of the SACNT framework but also enhance rate capability and charge/discharge reversibility with its pseudocapacitive storage mechanism. These anodes exhibit a high capability and a long cyclic lifetime (over 1000 cycles at 60 C) in half cells. They are further assembled to make flexible full cells, where binders, conductive agents, and current collectors are all unnecessary. The capacity decay of a full-cell test is almost negligible over 500 cycles of bending with a fast charging rate within 50 s, suggesting TiO2/SACNT films to be a promising material for flexible storage devices.
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高影响因子
Energy Storage Materials
·
2017
·
IF 0
Feilong Qiu,Xiaoyu Zhang,Yu Qiao,Xueping Zhang,Han Deng,Tianrui Shi,Ping He,Haoshen Zhou
Li metal is used as anode for Li–O 2 batteries because of its high specific capacity and low negative electrochemical potential. However, Li metal exhibits low Coulombic efficiency and limited cycle life, which hinder its practical use. In this study, we demonstrate that the performance of the Li metal anode was significantly improved by cycling in O 2 -rich electrolyte. In the presence of sufficient O 2 , the growth of Li dendrites was suppressed by the formation of flexible and mechanical strong solid electrolyte interphase layers. Consequently, Li metal anode remained stable over 800 cycles with 98.7% Coulombic efficiency. The origination of the superior performance was further analyzed through ion etching-assisted XPS and in situ electrochemical Raman spectroscopy . Our research provides a distinct and effective approach used to improve the stability and reversibility of Li metal anodes and reveal the superiority of Li metal systems in the presence of sufficient O 2 for Li-O 2 battery.
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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.
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高影响因子
NEW JOURNAL OF CHEMISTRY
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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.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2024
·
IF 3.8
Li Qin,Haifeng Yu,Hujun Zhang,Qilin Cheng,Ling Chen,Hao Jiang
All-dry solid-phase synthesis (ADSPS) is considered an eco-friendly and cost-effective method for preparing Ni-rich Co-poor cathodes, yet slow ion diffusion during the solid-phase sintering process results in agglomerate particles with severe Li/Ni mixing. Herein, a Mg/Sr-codoped and ZrO2-coated single-crystalline LiNi0.73Co0.05Mn0.22O2 cathode with a well-layered structure is fabricated through the ADSPS method. The Sr ions effectively accelerate the ion migration at the grain boundary to facilitate particle coarsening, while the Mg ions act as “pillar ions” to decrease the Li/Ni mixing and improve the structural stability. Moreover, the ZrO2 coating layer can further alleviate the interfacial side reactions to hinder the structure degradation and enhance the particle integrity. Therefore, the resultant single-crystalline cathodes deliver a high reversible capacity of 192.4 mAh g–1 and display an impressive retention of 87.5% after 300 cycles at 0.5 C in a pouch-type full cell. The ADSPS strategy in this work shows great potential for the synthesis of single-crystalline Ni-rich ternary cathodes for Li-ion batteries.
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高影响因子
Processes
·
2025
·Vol. 13
·期 1
·232
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IF 2.8
Jiulong Che,Jian Zhang,Qing Lang,Jiayuan Yu,Yixiao Yang,Longqi Luo,Zhiyi Liu,Jiahui Ye,Gang Wang
Dual-ion batteries (DIBs) were demonstrated as a promising technology for large-scale energy storage due to their low cost, recyclability, and impressively fast charge capability. Graphite as a commonly used cathode material in DIBs, however, suffers from poor compatibility with commercial Li-ion electrolytes and graphite anodes, making it difficult to directly utilize the well-established infrastructure for Li-ion batteries. Herein, we report a small aromatic amine molecule 4,4′,4″-tris(diphenylamino)triphenylamine (N4) functioning as a compatible anion host in the EC-containing Li-ion electrolyte. With an average discharge voltage of 3.6 V (vs. Li+/Li), the N4 electrode delivers a reversible specific capacity of 108 mAh/g, which is much higher than 29 mAh/g for the graphite cathode at the same condition. The high capacity retention of 91.3% was achieved after 500 cycles at 1 A/g. The N4 electrode also exhibited good rate performance. Via different characterization techniques like Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy, the energy storage mechanism of N4 was revealed as a conversion between amine and quaternary amine cations, accompanied by PF6−(de-)insertion. As consequences, the assembled N4||graphite DIB w showed a high discharge capacity of 90 mAh/g within 1.5–4.1 V, and good cycling stability with a 98% capacity retention after 40 cycles. Decent rate performance was achieved in the N4||graphite DIB as well. This work provides new insights into designing a compatible anion host for affordable DIBs.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Jing Wang,Jian Hao,Xiao Yang,Ruyi Zhang,Junli Guo,Yu Zhao,Jianing Chen,Caixia Chi
In order to overcome the problems about the volume expansion and poor electronic conductivity of Si , a flexibility and rigidity double coating layer CNTs-rGO- PAIN was constructed. The CNTs-rGO-PANI network with porous structure and high electronic conductivity provides sufficient space to accommodate the volume change of Si, and abundant transmission path for electron and Li ion . Moreover, the coating network with flexibility and rigidity characteristic could absorb the expansion stress of Si, maintain electrode structural integrity, promote the growth of stable SEI . The polymer-nanocarbon network dual coating layer effectively safeguards the electrochemical-mechanical interplay within the electrode. The 20Si-CNTs-rGO-PANI exhibits a reversible capacity as high as 1856 mAh g −1 after 400 cycles at 0.2 A g −1 and a remarkable rate capacity of 570 and 459 mAh g −1 , at 5 and 10 A g −1 , respectively. The outstanding Li ion storage performance of 20Si-CNTs-rGO-PANI anode, suggests the flexibility-rigidity dual coating layer strategy is a potential way to improve the performance of alloy type anode .
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Xianyu Liu,Jing Li,Yingchun Xiao,Xiangcheng Dong,Lei Tao,Zhiyuan Liu,Zheng Liu,Jia Zhang,Shengjie Xu
The Li metal anode is regarded as the most potential electrode material in the next-generation energy storage system, because of the high energy density and specific capacity. However, the advancement of Li metal anode is restricted by the volume changing and dendrite growth. In this paper, the Co and Zn co-doped porous carbon framework (CF-CZ) derived from MOF structure was designed and produced to realize the dendrite-free Li metal anode. The porous structure could accommodate the deposited Li metal, which relaxes the pressure of electrode structure and relieves the volume changes. Meanwhile, the Co, Zn co-doping effectively improves the lithiophilicity of framework, which attracts Li + and decreases the nucleation barrier. Besides, numerous micropores of MOF structure could divide the Li + flux to reduce the local current density for dense sedimentation. With the synergies of co-doping and porous structure, the symmetric cell of CF-CZ shows better electrochemical performance (the overvoltage can be stable at 14 mV after 1200 cycles) than pure Cu foil, and the LFP cells deliver 116.4 mAh g −1 at 1 C after 200 cycles. As a consequence, the CF-CZ possesses the potential to be applied in Li metal anodes.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·Vol. 49
·期 7
·2962-2972
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IF 2.5
Jiahe Li,Fang Du,Changsheng Tang,Luyang Wang,Yulin Yang,Debin Xia,Jian Zhang,Bowen Tao,Ping Wang,Kaifeng Lin
Al–Li alloys are considered promising materials in solid propellants owing to their higher combustion efficiency than Al particles, which exhibit incomplete combustion. However, Al–Li alloy particles cannot be directly applied in propellant systems owing to their poor compatibility. Thus, in this work, an in situ polymerized film was formed via the pretreatment of Al–Li alloy followed by polymerization with trifluoroethyl methacrylate (TFEMA) and N,N′-methylene-bis-acrylamide (MBA). The hydrothermal stability of the coated samples was improved with a mass variation rate of 5.82% on treatment with TFEMA (30%) and MBA (10%), corresponding to 116.62% of Al–Li at 60 °C and 75% humidity for 30 days. Besides, the thermostability increased based on the 19° backward skewing of the high temperature exothermic peak. Meanwhile, there were no pores and cracks in the HTPB propellant, which proved the possibility of its practical application with the compatibility of level 1 with HTPB in solid rocket motors. In addition, the Al–Li propellant exhibited a better combustion performance of 0.53 s and 1309.33 °C than the Q3 Al propellant, with 1.34 s ignition delay time and 990.24 °C burning temperature. The combustion efficiency was also improved based on the observation of combustion phenomena and residue size. Besides, the combustion mechanism was analyzed based on the characteristics of Al–Li with the micro-explosion effect. Therefore, Al–Li alloy has the potential to be used as a new generation solid propellant.
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高影响因子
DESALINATION
·
2024
·
IF 8.3
Xunshuang Zhang,Junxiang Wu,Yu He,Chenhao Zhao,Minfang An,Liangbin Li
Lithium (Li) reserves in liquid resources are significantly higher than solid lithium ores and can fully meet the growing demand for Li. Lithium-ion sieves (LIS) adsorption of Li from liquid resources is one of the most promising methods. However, conventional polymeric adsorption materials encapsulate most LIS in dense structures, leading to low adsorption capacity and slow adsorption rate. Therefore, HTO-PVA/PAAm hydrogel was synthesized from titanium-type lithium-ion sieves (HTO), acrylamide, and polyvinyl alcohol by free radical polymerization. The HTO-PVA/PAAm hydrogel is characterized by a soft three-dimensional (3D) network, continuously adjustable pore structure, high specific surface area, and excellent hydrophilicity. Accordingly, the HTO-PVA/PAAm owns an excellent Li + adsorption capacity (22.16 and 31.31 mg·g −1 in pH 7.2 and 12 of LiCl solutions, respectively) among reported advanced adsorbents. 90 % of Li + is desorbed within 60 min, indicating the efficient and rapid Li + desorption response of the hydrogel. Meanwhile, this hydrogel still maintains a Li + adsorption capacity of 90 % after eight adsorption-desorption cycles, during which Ti loss is <0.42 % in each cycle. In this work, HTO-PVA/PAAm hydrogel synthesized by an environmentally friendly and low-cost approach shows great application potential as a new strategy for Li + adsorption from liquid resources.
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高影响因子
ENERGY & FUELS
·
2024
·
IF 5.2
Aonan Wang,Yiming Guo,Fanghua Ning,Xiaoyu Liu,Fujun Li,Jiujun Zhang,Shigang Lu,Jin Yi
The lithium carbon dioxide (Li-CO2) battery is regarded as an attractive electrochemical energy storage system on account of its high energy density (∼1876 Wh kg–1) and utilization of “greenhouse gas” CO2. The main discharge product lithium carbonate (Li2CO3) is decomposed along with the inevitable formation of superoxide radicals (O2•–), and it results in irreversible side reactions, such as the deterioration of electrolytes and oxidation of the carbon cathode, which lead to unfavorable cycle life. Herein, sodium lignosulfonate (LSS) is introduced as a radical capture agent to reduce the reactivity of generated O2•– in the Li-CO2 battery. Combined with the results of adsorption energy calculation, it is found that O2•– can be preferentially adsorbed with LSS. It favors suppression of the side reactions between O2•– and the carbon cathode/electrolyte during charge. The discharge/charge voltage gap of the Li-CO2 battery is significantly reduced by 0.23 V with a long lifespan of over 200 cycles. This investigation demonstrates that the reactivity manipulation of the O2•– is essential to construct a stable and efficient Li-CO2 battery.
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高影响因子
ACS Nano
·
2025
·
IF 16
Yuying Qin,Jing Gao,Junze Lu,Yafei Li,Danni Du,Zhiwei Zhang,Chengxiang Wang,Jiafeng Li,Peng Xiao,Longwei Yin,Rutao Wang
Lithium-rich disordered rock-salt (DRS) materials exhibit potential for fast-charging Li-ion batteries and capacitors, primarily arising from their pseudocapacitive Li+ charge-storage behavior in a low-potential region (<1.0 V versus Li/Li+). This behavior originates from a three-dimensional (3D) Li+-percolation diffusion network, a mechanism defined as percolation pseudocapacitance. However, the relationship between the structural characteristics and pseudocapacitive behaviors remains unclear. Here, we design a series of DRS-Li3V2O5 with different degrees of crystallinity through adjusting the crystallization of V2O5 precursors. We show that DRS-Li3V2O5 with a lower degree of crystallinity exhibits quasi-rectangular cyclic voltammetry (CV) curves and sloped galvanostatic charge/discharge (GCD) profiles, characteristic of surface redox pseudocapacitance. On the contrary, DRS-Li3V2O5 with a higher degree of crystallinity shows a couple of redox peaks with a small voltage offset observed in CV curves and approximately plateau-like GCD profiles, which are characteristic of intercalation pseudocapacitance. Besides, a lower degree of crystallinity leads to a higher specific capacity at a low rate but a poorer rate capability at a high rate, whereas a higher degree of crystallinity leads to a higher pseudocapacitive contribution and a longer cycling lifespan. We propose that a higher degree of crystallinity can promote the formation of a more integrated percolation network on DRS electrodes, which provides faster 3D Li+ transport pathways.
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PubMed
高影响因子
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