WASTE MANAGEMENT
·
2020
·
IF 5.448
Jai Kumar,Xing Shen,Bo Li,Huizhou Liu,Junmei Zhao
To recycle the sharply growing spent lithium-ion batteries and alleviate concerns over shortages of resources, particularly Li, is still an urgent issue. In this work, an organic acids based leaching approach at room temperature is proposed to recover Li and FePO 4 from spent LiFePO 4 cathode powder. The coexistent metal ions, Cu and Al, have also been investigated. Citrus fruit juices, rich in organic acids, such as citric acid and malic acid, have been used as leaching agents in this work. Among lemon, orange and apple, lemon juice shows the best leaching effect based on its suitable pH of the reaction system. Under the optimized conditions, the leaching rates of Li, Cu and Al can reach up to 94.83%, 96.92% and 47.24%, while Fe and P remain as low as 4.05% and 0.84%, respectively. Li 2 CO 3 and FePO 4 can be recovered from the leachate and the leaching residue, respectively. The recovered FePO 4 was used to prepare new cathode material LiFePO 4 . The crystalline carbon, present in the spent LiFePO 4 cathode scraps, has a significant effect on the electrochemical performances of the regenerated LiFePO 4 . The regenerated LiFePO 4 cathode material delivered a comparable discharge capacity of 155.3 mAh g −1 at 0.1C and rate capacity to the fresh LiFePO 4 . For the cycling stability, it displays capacity retention of 98.30% over 100 cycles at 1 C with a fading rate of 0.017% per cycle. The proposed organic acids-based recycling strategy is much benign for recycling the spent LiFePO 4 cathode materials.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2022
·
IF 6.449
Jiang-Meng Yuan,Ke Wang,Ting-Ting Su,Bing-Yu Chi,Wen-Feng Ren,Run-Cang Sun
Lithium (Li) metal batteries are deemed to an outstanding candidate of next-generation energy storage instruments due to their low electrochemical potential as well as high theoretical capacity. Nonetheless, the uncontrolled dendrite growth of Li and side reaction occurrence of Li metal anodes hamper their application. In this work, we fabricated an organic corncob lignin /inorganic lithium nitride composite layer by a facile in-situ coating method. For one thing, the organic corncob lignin layer can avoid direct contaction of Li with electrolyte, reduce the occurrence of undesirable reactions, and enhance the stability of electrode/electrolyte interface. For another, the component of inorganic lithium nitride in the composite layer can facilitate the ion transportation between electrolyte and Li metal anodes, increase mechanical properties of the film, decrease the nucleation overpotential, and eventually suppress the growth of Li dendrite. The Li metal anodes with composite protective layers exhibit good cycling property of 2000 h at 1.5 mA cm −2 with 1.5 mAh cm -2 . The Li-S full batteries assembled with Li metal anodes coated by composite protective layers show good cycling performance of 513.7 mAh g -1 after 300 cycles in contrast to bare Li. This study provides a simple coating method to fabricate artificial solid electrolyte interphase layer and promotes to realizing stable and safe Li-metal batteries and recycling the lignin from industrial waste.
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Zhenpu Shi,Juhong Xu,Yujiao Wang,Yudong Pang,Wanli Zhao,Hongyun Yue,Zongxian Yang,Shu-Ting Yang,Yanhong Yin
Lithium polysulfides (LiPSs) shuttling effect is the main problem to be solved for cathode materials of lithium–sulfur batteries. The adsorption and catalytic conversion of LiPSs by host materials have become the main focus of cathode materials. In this work, transition metal phosphides are combined with three-dimensional carbon nanosheets to form an efficient and stable sulfur host material. The designed composite material is effective in solving the problems of slow reaction kinetics of Li–S batteries and LiPSs shuttling. Here, through the supramolecular self-assembly process of melamine and phytic acid, combined with soluble salt template technology, N- and P-codoped three-dimensional hierarchical porous carbon materials with uniformly dispersed CoP nanoparticles were efficiently synthesized. The catalytic effect of CoP nanoparticles improves the reaction kinetics effectively of LiPS conversion. The strong polarity of CoP nanoparticles is beneficial to the adsorption of polysulfide ions. Moreover, the high specific area provides more LiPS adsorption sites, and the doping of N and P heteroatoms further increases the active sites of the composites. The experimental results and theoretical calculations show that the introduction of CoP promotes the conversion of LiPSs and accelerates the nucleation rate of Li2S, thereby improving the electrochemical performance of the composite as a sulfur host for lithium–sulfur batteries.
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Chemistry
·
2023
·
IF 5.5
Liping Zhao,Ye Zhao,Lihe Zhao,Gang Liu
A nitrogen–sulfur dual-doped black fungus porous carbon (NS-FPC) matrix was prepared with natural black fungus as the carbon source and cysteine as the nitrogen–sulfur source. A black fungus-based solution was obtained by hydrothermal treatment. After further carbonization activation and combination with sulfur processing, the NS-FPC/S positive electrode materials were prepared. The uniform recombination of biomass carbon provides an efficient conductive framework for sulfur. The porous structure is conducive to the transport of electrolytes. Heteroatom doping can provide a more active site. The structure and composition analyses of the materials were carried out using X-ray diffraction (XRD). The electronic binding energy and bonding state were analyzed by X-ray photoelectron spectroscopy (XPS). The morphology was observed by scanning electron microscopy and transmission electron microscopy. The specific surface area and pore size distribution were analyzed using an N 2 adsorption–desorption experiment. Sulfur loading was determined through thermogravimetric analysis. The electrochemical performance of NS-FPC/S in Li–S batteries was systematically investigated. The result shows that the NS-FPC/S electrode maintains more than 1,000 mAh g -1 reversible capacity after 100 cycles at 0.2 C current density, with a capacity retention of 85%. The cycle and rate performance are both considerably superior to those of traditional activated carbon materials.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Carbon Energy
·
2023
·
IF 20.5
Feiyang Yang,Ying Yao,Yunkai Xu,Cong Wang,Meiling Wang,Jingjie Ren,Cunzhong Zhang,Feng Wu,Jun Lu
Although biomass-derived carbon (biochar) has been widely used in the energy field, the relation between the carbonization condition and the physical/chemical property of the product remains elusive. Here, we revealed the carbonization condition's effect on the morphology, surface property, and electrochemical performance of the obtained carbon. An open slit pore structure with shower-puff-like nanoparticles can be obtained by finely tuning the carbonization temperature, and its unique pore structure and surface properties enable the Li–O 2 battery with cycling longevity (221 cycles with 99.8% Coulombic efficiency at 0.2 mA cm −2 and controlled discharge–charge depths of 500 mAh g −1 ) and high capacity (16,334 mAh g −1 at 0.02 mA cm −2 ). This work provides a greater understanding of the mechanism of the biochar carbonization procedure under various pyrolysis conditions, paving the way for future study of energy storage devices.
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Energy
·
2023
·
IF 9.3
Jian Wang,Yifan Liu,Guilu Qin,BaoShan Wu,Zongkai Yan,Nasir Mahmood,Xian Jian,Huakun Liu
The low intrinsic conductivity of carbon monofluoride (CF x ) extremely limits the high-power application of lithium/carbon monofluoride (Li/CF x ) primary batteries. Herein, silver nanowires were grown in situ on the surface of CF x material by an aldehyde reduction method in polyhydric alcohol. The interface interaction between silver nanowires (Ag NWs) and the surface of CF x material was studied. Ag NWs@CF x hybrids modulate the electronic structure of CF x and enhance the electrochemical activity of C–F bonds, thus increasing the availability of F atoms to participate in the discharge reaction. The electrochemical performance results show that the voltage platform, specific capacity, and energy density of the Li/CF x batteries were enhanced with a certain concentration of Ag NWs on the CF x surface. The 10% Ag NWs@CF x sample achieved a power density of 10376.09 W/kg and an energy density of 840 Wh/Kg at a discharge rate of 8C, which is significantly better than the pristine CF x . The performance of Li/CF x batteries is improved by building an Ag conductivity chain and enhancing the electrochemical activity of C–F bonds through a simple hydrothermal method , which effectively expands the application prospects of Li/CF x batteries in the field of high-power devices.
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Pharmacology
·
2023
·
IF 5.6
Li Jingyan,Wu Bingmin,Zeng Lishan,Lin Ying,Chen Qiuhe,Wang Haixia,An Lin,Zhang Jiajun,Chen Siyan,Huang Junying,Zhan Ruoting,Zhang Guifang
Background: The present study aimed to investigate the protective effect of the water extract of Amydrium sinense (Engl.) H. Li (ASWE) against hepatic fibrosis (HF) and clarify the underlying mechanism.Methods: The chemical components of ASWE were analysed by a Q-Orbitrap high-resolution mass spectrometer. In our study, an in vivo hepatic fibrosis mouse model was established via an intraperitoneal injection of olive oil containing 20% CCl4. In vitro experiments were conducted using a hepatic stellate cell line (HSC-T6) and RAW 264.7 cell line. A CCK-8 assay was performed to assess the cell viability of HSC-T6 and RAW264.7 cells treated with ASWE. Immunofluorescence staining was used to examine the intracellular localization of signal transducer and activator of transcription 3 (Stat3). Stat3 was overexpressed to analyse the role of Stat3 in the effect of ASWE on HF.Results: Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analyses showed that candidate targets of ASWE, associated with protective effects against hepatic fibrosis, were related to inflammation response. ASWE ameliorated CCl4-induced liver pathological damage and reduced the liver index and alanine transaminase (ALT) and aspartate transaminase (AST) levels. ASWE also decreased the serum levels of collagen Ⅰ (Col Ⅰ) and hydroxyproline (Hyp) in CCl4-treated mice. In addition, the expression of fibrosis markers, including α-SMA protein and Acta2, Col1a1, and Col3a1 mRNA, was downregulated by ASWE treatment in vivo. The expression of these fibrosis markers was also decreased by treatment with ASWE in HSC-T6 cells. Moreover, ASWE decreased the expression of inflammatory markers, including the Tnf-α, Il6 and Il1β, in RAW264.7 cells. ASWE decreased the phosphorylation of Stat3 and total Stat3 expression and reduced the mRNA expression of the Stat3 gene in vivo and in vitro. ASWE also inhibited the nuclear shuttling of Stat3. Overexpression of Stat3 weakened the therapeutic effect of ASWE and accelerated the progression of HF.Conclusion: The results show that ASWE protects against CCl4-induced liver injury by suppressing fibrosis, inflammation, HSC activation and the Stat3 signaling pathway, which might lead to a new approach for preventing HF.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Nan Wang,Linhao Sun,Xuecheng Cao,Jialin Fu,Shuo Qi,Lingling Tang,Dangsheng Xiong
Li–air batteries with ultrahigh energy density are attracting attention, but at present, their practical applications are severely limited by water intrusion in the air. Herein, we loaded PtCo alloy nanoparticles on a N-doped porous carbon surface to create a novel hydrophobic functional catalyst. This catalyst effectively inhibited water contamination and suppressed the occurrence of side reactions. Li–air batteries with hydrophobic functional catalysts exhibited over double the cycle performance in both humid oxygen (∼50% relative humidity, over 255 h) and ambient air (CO 2 : 700 ppm, ∼55% relative humidity, over 135 h) at a current density of 500 mA g -1 . In addition, the discharge specific capacities of humid oxygen and ambient air were increased to 18719.3 mAh g -1 and 11,385 mAh g -1 .
✓ 已验证
产品关联
DOI
高影响因子
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
·
2023
·Vol. 120
·期 14
·e2213130120
·
IF 11.1
Honghuai Sun,Qingming Song,Zhenming Xu
The value of considerable residual energy in waste Li-ion batteries (WLIBs) is always neglected. At present, “this energy” is always wasted during the discharge process of WLIBs. However, if this energy could be reused, it would not only save a lot of energy but also avoid the discharge step of recycling of WLIBs. Unfortunately, the instability of WLIBs potential is a challenge to efficient utilization of this residual energy. Here, we propose a method that could regulate the cathode potential and current of the battery by simply adjusting the solution pH to utilize 35.08%, 88.4%, and 84.7% of the residual energy for removing heavy metal ions from wastewater, removing Cr (VI) from wastewater, and recovering copper from the solution, respectively. By taking advantage of the high internal resistance R of WLIBs and the sudden change of battery current I caused by iron passivation on the positive electrode of the battery, this method could induce the response of overvoltage η (η = IR) inside the battery at different pH levels to regulate the cathode potential µ of the battery to the three intervals. The potential ranges of the battery cathode corresponding to pH < 3.4, pH ≈ 3.4, and pH > 4 were µ > −0.47V, −0.47V < µ < −0.82V, and µ < −0.82V, respectively. This study provides a promising way and theoretical basis for the development of technologies for reusing residual energy in WLIBs.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2018
·Vol. 28
·期 13
·1706513
·
IF 13.325
Xuyan Ni,Tao Qian,Xuejun Liu,Na Xu,Jie Liu,Chenglin Yan
The “shuttle effect” that stems from the dissolution of polysulfides is the most fatal issue affecting the cycle life of lithium-sulfur (Li–S) batteries. In order to suppress the “shuttle effect,” a new strategy of using a highly lithium ion conductive lithium fluoride/graphene oxide (LiF/GO) solid electrolyte interphase (SEI) to mechanically prevent the lithium dendrite breakthrough is reported. When utilized in Li–S batteries, the LiF/GO SEI coated separator demonstrates significant feature in mitigating the polysulfide shuttling as observed by in situ UV–vis spectroscopy. Moreover, the restrained “shuttle effect” can also be confirmed by analysis of electrochemical impedance spectroscopy and characterization of lithium dendrites, which indicates that no insulating layer of solid Li 2 S 2 /Li 2 S is found on lithium anode surface. Furthermore, the LiF/GO SEI layer puts out good lithium ion conductivity as its lithium ion diffusion coefficient reaches a high value of 1.5 × 10 −7 cm 2 s −1 . These features enable a remarkable cyclic property of 0.043% of capacity decay per cycle during 400 cycles.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Ming Luo,Xiao Yu,Wenxia Zhao,Ruimei Xu,Yong Liu,Hui Shen
Extensive efforts have been devoted to developing simple, low-cost, and high-production-yield methods to prepare hybrid materials with desired structural features for high-performance lithium storage. Here, a novel strategy is reported for fabricating the porous TiO2 nanofibers decorated with N-doped carbon (TiO2/C nanofibers) by a combination of mechanical stirring and the addition of a polymer in a beaker at ambient temperature, followed by calcination. The mechanical stirring process can provide homogeneous mixing of reactants in a solution, whereas the polymer acts not only as a structure-directing agent for fabricating one-dimensional nanofibers but also as the carbon and nitrogen source to generate N-doped carbon framework and porous structures. The TiO2/C nanofibers have average diameters of 500 nm and lengths up to 65 μm and are further composed of intercrossed TiO2 nanocrystals with sizes of 8 nm, with micropores centered at 1.5 nm and mesopores at 3–6 nm. The TiO2/C electrodes demonstrated a high reversible capacity (368 mAh g–1 at 0.25C after 200 cycles), good cycling performance (176 mAh g–1 at 10C over 2000 cycles), and excellent rate capability (97 mAh g–1 at 20C).
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NANO
·
2018
·
IF 1.1
Huagen Li,Shubin Wang,Mengjie Feng,Jiping Yang,Boming Zhang
Herein, we report a hierarchical structure formed by wrinkled reduced graphene oxide (rGO) sheets-wrapped carbon fiber via a facile and efficient electrostatic self-assembly method and subsequent annealing treatment. For this material, the Weibull scale parameter is 4.77 GPa. After 100 cycles, the rGO@CF retains 91% of its second charge capacity at 50 mA ⋅g −1 , corresponding to a capacity fading of only 0.09% per cycle. Thus, this structural anode material exhibits enhanced capacity, high initial Coulombic efficiency and high tensile strength. Meanwhile, the carbon fiber and interweaved rGO sheets together form the whole conductive networks to provide multichannel highways for charge transfer (lithium-ion diffusion and electron transport) during discharge–charge processes, promising excellent electrochemical performance of this structural anode material.
✓ 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）