CHEMICAL ENGINEERING JOURNAL
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2013
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IF 3.473
Guiru Zhu,Pan Wang,Pengfei Qi,Congjie Gao
A series of PVC-Li 1.6 Mn 1.6 O 4 precursor membranes were prepared by the solvent exchange method using spinel-type lithium manganese oxide powder (Li 1.6 Mn 1.6 O 4 ) as the precursor, poly(vinyl chloride) (PVC) as the binder, and N,N-dimethyl acetamide (DMAc) as solvent. The Li + of the precursor membrane was extracted by treated with HCl solution to obtain PVC-H 1.6 Mn 1.6 O 4 lithium ion-sieve membrane adsorbent. The preparation conditions were investigated by changing the concentration of PVC and Li 1.6 Mn 1.6 O 4 , and the thickness of liquid film . The structure, morphology and adsorption properties of PVC-H 1.6 Mn 1.6 O 4 lithium ion-sieve membrane were carried out by scanning electron microscope and atomic absorption spectrophotometer. The adsorption capacity depended on the preparation conditions. The membrane prepared with concentration of 10 wt% PVC and 15 wt% Li 1.6 Mn 1.6 O 4 in DMAc and liquid film thickness of 0.30 mm is optimum for the adsorption of Li + from aqueous solution. The thickness of membrane prepared under above conditions is about 0.1 mm. Repeated adsorption–desorption test indicates that the PVC-H 1.6 Mn 1.6 O 4 lithium ion-sieve membrane can be effectively regenerated with HCl solution and reused for Li + adsorption without significant loss in the adsorption capacity. Li + adsorption experiments confirm that the PVC-H 1.6 Mn 1.6 O 4 lithium ion-sieve membrane possesses high selectivity for Li + in the presence of Na + , K + , Ca 2+ and Mg 2+ . According to the coefficients, the isothermal data correlated with the Langmuir model better than the Freundlich model, and the adsorption process follows a pseudo-second-order kinetic model .
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2017
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IF 3.133
Jingang Yang,Junke Hou,Yubin Niu,Wenjun Li,Fenglian Yi,Sangui Liu,Guannan Li,Maowen Xu
Ti 0.9 Fe 1.1 O 3 with a solid solution structure has been synthesized and investigated as an anode material for rechargeable Li-ion batteries. Ti 0.9 Fe 1.1 O 3 was prepared by a solid-state reaction of Fe, Fe 2 O 3 and TiO 2 . Without other modification, the obtained Ti 0.9 Fe 1.1 O 3 exhibited high discharge capacity and remarkable cycle capability compared with the commercial Fe 2 O 3 sample. A reversible capacity of 454.9 mA h g −1 and coulombic efficiency of 100% at 100 mA g −1 could be achieved and kept even after 500 cycles. The prominent electrode performance could be attributed to the stable solid solution structure, in which Titanium is inactive and only support the unstable structure during reversible electrochemical processes .
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DOI
高影响因子
CARBON
·
2021
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IF 9.594
Tianci Cao,Xiaopeng Cheng,Rui Wu,Mingming Wang,Jiajia Niu,Huan Liu,Xianqiang Liu,Junxia Lu,Yuefei Zhang
Li metal is the prospective candidate of next generation anode materials . However, the growth of dendritic Li during electrochemical cycling has severely hindered the practical application of rechargeable Li-metal batteries. Herein, “seaweed” graphene paper (SGP) is designed for 3D matrix of Li metal anode to address the growth of dendrites. SGP has abundantly exposed edges of graphene sheets and realizes ultrahigh density nucleation. Compared with nonuniform lithium deposition on parallelly stacked GP which has been observed by in-situ scanning electron microscopy, electrochemical deposition behavior of Li in SGP manifests as uniformly distributed granular lithium. Significant decrease of nucleation barrier can be observed during the dendrite-free deposition. With the elimination of dendritic Li growth and excellent stability of SGP host, the lithium anode based on SGP can run over 2500 cycles without short circuit and exhibits low voltage hysteresis. When matched with cathode LiCoO2, the full battery also presents stable cycling. There is no trace of lithium dendrite even after 1200 cycles which proves continuously regulating effect on lithium dendrites by SGP host. This work further develops potential application of graphene materials in the Li anode with high reversibility for stable cycling Li metal batteries .
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DOI
高影响因子
ACS Applied Nano Materials
·
2024
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IF 5.3
Zhanwei Xu,Hang Niu,Ying Zhang,Siyu Chen,Wenyang Li,Jiayin Li,Liang Li,Xuetao Shen
The shuttle behavior and sluggish conversion kinetics of polysulfides (LiPSs) significantly hinder sulfur utilization and cycle stability of lithium–sulfur (Li–S) batteries. Herein, iron hexadecafluorophthalocyanine (FePcF16) nanoparticles were in situ tailored on oxidized apple pomace carbon (OAPC) with a 3D porous structure to construct a high-performance FePcF16/OAPC sulfur host for advanced Li–S batteries. The designed FePcF16 nanoparticles have strong adsorption and catalytic conversion capabilities, which can reduce the redox reaction energy barrier, accelerate the conversion rate, and inhibit the LiPS shuttle. Meanwhile, the unique porous structure of OAPC effectively realizes the sulfur accommodation and rapid transport of substances. The average capacities of batteries with FePcF16/OAPC were 926.83, 847.11, and 782.63 mA h/g after 500 cycles at 1, 2, and 3C current densities, with capacity decay rates of only 0.020%, 0.031%, and 0.043% per cycle, respectively. Furthermore, it delivers favorable cycling stability at a sulfur load of 4.32 mg/cm2.
研究领域:
储能
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材料科学
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电化学
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纳米材料
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电池技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Shuxin Zhang,Wen Ren,Yanna NuLi,Baofeng Wang,Jun Yang,Jiulin Wang
Magnesium-sulfur (Mg-S) batteries are an alternative electrochemical energy-storage system with higher safety as well as large theoretical volumetric energy density than lithium-sulfur (Li-S) batteries. Herein, we further research sulfurized-pyrolyzed polyacrylonitrile (S@pPAN) composite containing 47.3 wt% sulfur as cathode of Mg-S batteries with nucleophilic (PhMgCl) 2 -AlCl 3 + LiCl/THF electrolyte. Except a significant restraint of the reaction between the nucleophilic electrolyte and the electrophilic sulfur, polysulfide dissolution and shuttle are effectively suppressed. Electrochemical performance is further enhanced using MBA-(MgCl 2 ) 2 -(AlCl 3 ) 2 + LiCl/THF non-nucleophilic electrolyte with 677.9 mAh g −1 specific capacity and 75.9% cycling stability after 85 cycles at 0.1C. More effective CEI layers formed on the cathode with a lower electrode/electrolyte internal resistance play a key effect on the enhanced electrochemical performance. This work will attract extensive study on Mg-S batteries containing easily prepared electrolytes with a combination of S@pPAN cathode.
研究领域:
电化学
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储能材料
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电池技术
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材料科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
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2017
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IF 7.504
Biyi Xu,Huanan Duan,Hezhou Liu,Chang−An Wang,Shengwen Zhong
To improve the solid-electrolyte/electrode interface compatibility, we have proposed the concept of hybrid electrolyte by including a small amount of liquid electrolyte in between. In this work, n-BuLi, a superbase, has been found to significantly improve the cycling performance of LiFePO4/Li hybrid cells containing Li7La3Zr1.5Ta0.5O12 (LLZT) and conventional carbonate-based liquid electrolyte. The modified cells have been cycled for 400 cycles at 100 and 200 μA cm–2 at room temperature, indicating excellent solid/liquid electrolyte interface stability. The role of n-BuLi may be 3-fold: to retard the decomposition reaction of LE, to suppress the Li+/H+ exchange, and to lithiate the garnet/LE interface, inhibiting side reactions and enhancing interfacial lithium-ion transport.
研究领域:
材料科学
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电化学
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储能技术
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固态电池
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DOI
高影响因子
ELECTROCHIMICA ACTA
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2023
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IF 6.6
Fangjun Ye,Jiafei Gao,Xiaolin Yan,Hongfei Zheng,Wei He,Liang Lin,Fang Liu,Shasha Qu,Qingshui Xie,Qing Luo,Dong-Liang Peng
The practical application of Li metal anode is hindered by the uncontrollable dendrites growth, severe side reactions and huge volume fluctuation, which would result in low Coulombic efficiency (CE) and poor cycling performance. Herein, a 3D Li host is functionalized by a low-cost and environment-friendly polyvinyl alcohol (PVA) layer via a facile solution immersion method to solve the above issues. The polymer layer can act as a stable artificial SEI with high ionic conductivity during cycling, so as to isolate the direct contact between Li metal and electrolyte and then avoid interfacial side reaction. In addition, the abundant hydroxyl (−OH) polar groups in PVA, which own a strong binding energy with Li atoms, can effectively regulate Li plating/stripping behaviors on the 3D framework. As a result, the symmetric cell using PVA-Cu mesh-Li electrode delivers a superior long-term stability over 1000 h with a low average voltage hysteresis of 17 mV at 1 mA cm −2 . And the PVA-Cu mesh-Li || LiFePO 4 full cell can remain a high discharge capacity of 104.4 mAh g −1 and a high CE of 99.1% after 350 cycles at 5 C.
研究领域:
材料科学
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储能
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电化学
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电池技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
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2017
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IF 7.504
Si-Yu Liu,Chao-Ying Fan,Yan-Hong Shi,Han-Chi Wang,Xing-Long Wu,Jing-Ping Zhang
A three-layered cathode structure was designed to minimize the shuttle effect of polysulfides and improve active material utilization. The three-layered configuration was fabricated by directly dropping pure sulfur composite slurry into multifunctional dual-barrier layers consisting of a self-standing TiO2/C interlayer and a very thin acetylene black layer (0.35 mg cm–2). In consequence, a decent discharge capacity of 963 mA h g–1 was acquired after 100 cycles at 0.1 C. With cycling at 0.1, 0.2, 0.5, 1, and 2 C, the cells displayed excellent reversible capacities of 1203, 1145, 1035, 934, and 820 mA h g–1, respectively. Furthermore, the cells still delivered a satisfactory discharge capacity of 799 mA h g–1 after 300 cycles at 0.5 C. The light mass of the three-layered configuration guarantees that the energy density is effectively improved, considering the overall mass of the cathode. The energy density (603 W h kg–1 after 100 cycles) was at a high level compared with those of the reported ones. Therefore, it is believed that the synergistic design for the three-layered cathode structure, which combines the mass-produced layer-by-layer structure, provides a novel protocol to the practical application of lithium–sulfur batteries.
研究领域:
储能技术
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材料科学
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电化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
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2016
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IF 7.145
Chao-Ying Fan,Si-Yu Liu,Huan-Huan Li,Hai-Feng Wang,Han-Chi Wang,Xing-Long Wu,Hai-Zhu Sun,Jing-Ping Zhang
The synergistic design of cathode region was conducted to minimize the shuttle effect of polysulfides and decrease the loading of inactive components in order to acquire high-energy-density lithium–sulfur (Li–S) batteries. The well-designed cathode region presented two special characteristics: one was the intertwined nanofibers interlayer based on ultrafine TiO2 nanocrystal uniformly embedded within N-doping porous carbon; the other was the lightweight and three-dimensional current collector of fibrous cellulose paper coated by reduced graphene oxide. In consequence, the decent reversible capacity of 874.8 mA h g–1 was acquired at 0.1 C with a capacity retention of 91.83% after 100 cycles. Besides, the satisfactory capacity of 670 mA h g–1 was delivered after 300 cycles at 1 C with the small decay rate of only 0.08%. Because of higher capacity and lower loading of inactive component in cathode region, the energy density of cell increased more than five times compared with unmodified cell. Moreover, to further enhance the energy density, the high-sulfur-loading electrode was fabricated. A good areal capacity of 4.27 mA h cm–2 was retained for the cell with the active material of 4 mg cm–2 and the cycle stability was also well-maintained. In addition, due to the flexibility of interlayer and current collector, Li–S full cell (in pouch cell format) was easily curved. Therefore, the synergistic design for cathode region, which combines the flexible and mass-produced interlayer and current collector together, provides an effective access to Li–S batteries with high energy density and flexibility for practical application.
研究领域:
储能
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材料科学
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电化学
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纳米材料
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电池技术
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DOI
高影响因子
ACS Applied Energy Materials
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2018
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IF 0
Libin Wang,Huiling Yang,Ting Shu,Yue Xin,Xue Chen,Yuyu Li,Heng Li,Xianluo Hu
Li-ion capacitors, comprising a battery anode and a supercapacitor cathode, have been expected to bridge the gap between batteries and supercapacitors. However, the kinetics mismatch between the anodic sluggish insertion and the cathodic capacitive process has impeded the energy-storage potential of devices. Developing pseudocapacitive anode materials is urgently needed in that pseudocapacitance can deliver energy in the same time scale as electrostatic adsorption and offer a comparable level of energy storage to that of battery-type materials. Here we demonstrate an inside and outside synergistic nanoengineering strategy to synthesize nanoporous carbon-modified S-TiO2 hybrid nanosheets, through which both the carbon layer and sulfur doping can be simultaneously generated in situ. Benefiting from the in situ S doping, the electronic and ionic conductivity of anatase TiO2 nanoparticles is enhanced. The carbon-modified S-TiO2 with dominant pseudocapacitance realizes an unprecedentedly high capacity of 550 mAh g–1 at 0.3 C and excellent rate capability, outperforming that of the ever-reported TiO2-based materials. Furthermore, a hybrid Li-ion capacitor based on the as-obtained carbon-modified S-TiO2 electrode has been assembled, delivering a high energy density of 92.7 Wh kg–1 and power density of 26 kW kg–1 with a stable cycling life (85.8% after 10 000 cycles). Our work offers a new avenue for achieving electrode materials with extrinsic pseudocapacitance that is kinetically comparable to capacitive materials.
研究领域:
材料科学
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能量存储与转换
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纳米技术
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电化学
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DOI
ACS Nano
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2017
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IF 13.942
Wenshu Chen,Jiajun Gu,Qinglei Liu,Ruichun Luo,Lulu Yao,Boya Sun,Wang Zhang,Huilan Su,Bin Chen,Pan Liu,Di Zhang
We prepare group VI transitional metal dichalcogenides (TMDs, or MX2) from the 1T phase with quantum-sized and monolayer features via a quasi-full electrochemical process. The resulting two-dimensional (2D) MX2 (M = W, Mo; X = S, Se) quantum dots (QDs) are ca. 3.0–5.4 nm in size with a high 1T phase fraction of ca. 92%–97%. We attribute this to the high Li content intercalated in the 1T-MX2 lattice (mole ratio of Li:M is over 2:1), which is achieved by an increased lithiation driving force and a reduced electrochemical lithiation rate (0.001 A/g). The high Li content not only promotes the 2H → 1T phase transition but also generates significant inner stress that facilitates lattice breaking for MX2 crystals. Because of their high proportion of metallic 1T phase and sufficient active sites induced by the small lateral size, the 2D 1T-MoS2 QDs show excellent hydrogen evolution reactivity (with a typical η10 of 92 mV, Tafel slope of 44 mV/dec, and J0 of 4.16 × 10–4 A/cm2). This electrochemical route toward 2D QDs might help boost the development of 2D materials in energy-related areas.
研究领域:
材料科学
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纳米技术
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电化学
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能量存储与转换
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催化
✓ 已验证
DOI
高影响因子
Journal of the American Chemical Society
·
2024
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IF 14.4
Jing-Chang Li,Jiayi Tang,Jiaming Tian,Chen Cheng,Yuxin Liao,Bingwen Hu,Tao Yu,Haoyu Li,Zhaoguo Liu,Yuan Rao,Yu Deng,Liang Zhang,Xiaoyu Zhang,Shaohua Guo,Haoshen Zhou
The utilization of anionic redox chemistry provides an opportunity to further improve the energy density of Li-ion batteries, particularly for Li-rich layered oxides. However, oxygen-based hosts still suffer from unfavorable structural rearrangement, including the oxygen release and transition metal (TM)-ion migration, in association with the tenuous framework rooted in the ionicity of the TM–O bonding. An intrinsic solution, by using a sulfur-based host with strong TM–S covalency, is proposed here to buffer the lattice distortion upon the highly activating sulfur redox process, and it achieves howling success in stabilizing the host frameworks. Experimental results demonstrate the prolonged preservation of the layered sulfur lattice, especially the honeycomb superlattice, during the Li+ extraction/insertion process in contrast to the large structural degeneration in Li-rich oxides. Moreover, the Li-rich sulfide cathodes exhibited a negligible overpotential of 0.08 V and a voltage drop of 0.13 mV/cycle, while maintaining a substantial reversible capacity upon cycling. These superior electrochemical performances can be unambiguously ascribed to the much shorter trajectories of sulfur in comparison to those of oxygen revealed by molecular dynamics simulations at a large scale (∼30 nm) and a long time scale (∼300 ps) via high-dimensional neural network potentials during the delithiation process. Our findings highlight the importance of stabilizing host frameworks and establish general guidance for designing Li-rich cathodes with durable anionic redox chemistry.
研究领域:
材料科学
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电化学
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储能技术
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锂离子电池
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计算材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）