ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 53
·114327-114335
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IF 5.8
Zhou Hao,Zhang Dayong,Jiang Yongjun,Zeng Bo,Zhao Chenxi,Zhang Mingjie,Zeng Baiyan,Zhu Xiaoquan,Su Xintai,Romanovski Valentin,Bi Ran
The spent carbon cathode (SCC) is a hazardous solid waste from aluminum production. It has an abundant carbon source and a unique graphitic carbon layer structure, making it a valuable waste for recycling. This paper uses alkaline and acid leaching methods to report a straightforward way of extracting recovered carbon (RC) from SCC as anode material for lithium-ion batteries (LIBs). The results show that alkaline and acid leaching conditions at 70 °C with 1 M NaOH and HCl solution individually in 6 h and a liquid-solid ratio of 20:1 can result in RC with up to 94.63% carbon content than 49.38% in SCC, exhibiting a typical graphite structure. SCC and RC materials are obtained after calcination at 400 °C in an inert atmosphere and used as anode materials (SCC-400 and RC-400). In this paper, The initial charging specific capacities are 490.0 mA h g −1 , 195.4 mA h g −1 , and 423.2 mA h g −1 and initial coulombic efficiencies (ICE) are 67.8%, 78.9%, and 72.0% of RC-400, SCC, and SCC-400. RC-400 also shows excellent capacity retention and impedance values. This exciting finding provides a viable, non-hazardous, and resourceful method for treating and disposing of SCC from aluminum electrolysis.
研究领域:
材料科学
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环境科学
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能源科学
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DOI
PubMed
高影响因子
Journal of Cleaner Production
·
2024
·
IF 9.7
Xiaowei Chen,Zhengjie Chen,Yonghang Zhang,Xiuhua Chen,Ruizhe Wang,Dandan Wu,Wenhui Ma
Spent carbon cathode is a kind of solid waste produced by the electrolytic aluminum industry, and it poses a high environmental risk. However, it also contains valuable graphite resources that can be recycled and used as raw materials in industry. In this work, we aimed to enhance the efficient recovery of graphite by introducing ultrasonic waves into the flotation process. Particle size test, inductively coupled plasma (ICP), BET surface area, and other analytical techniques confirmed that ultrasound could promote particle dispersion, clean the surface of minerals, increase the porosity of the graphite surface, and thus strengthen the flotation performance. The results showed that after ultrasonic treatment for 30 min, the recovery rate of graphite increased from 86.22% to 96.24%, the fixed carbon content of tailings decreased from 26.99% to 9.68%, and the fixed carbon content (84.95%) was close to that of conventional flotation (85.32%). Compared with the traditional purification method, this strategy reduces the follow-up cleaning steps of tailings, simplifies the process, reduces the use of chemicals, and features strong market competitiveness and green environmental protection advantages. Additionally, the process is simple and low-cost and can be applied to the recycling of other waste graphite, with potential industrial application prospects.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2022
·Vol. 51
·期 8
·4115-4124
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IF 2.047
Li Jiaojiao,Xiao Zhen,Zhou Xiaozheng,Zhang Wenkui,Zhang Jun,Gan Yongping,Huang Hui,He Xinping,Wang Guoguang,Xia Yang
Lithium-sulfur (Li-S) batteries are a promising electrochemical energy storage device due to their low cost, high energy density, and excellent sustainability, making them superior to many commercial lithium-ion batteries. Despite the great road to market, Li-S batteries still suffer from low practical energy density, which is intimately related to fundamental scientific and technological issues of sulfur cathodes. As a non-negligible parameter in sulfur cathodes, the compaction density plays a crucial role in the energy density of Li-S batteries. Herein, the effect of compaction density of sulfur/carbon cathodes on the electrochemical performance of Li-S batteries is investigated. It is demonstrated that sulfur/carbon cathodes with an optimized compaction density of 1.2 g cm −3 not only can guarantee the good contact of active materials, but can also ensure the rational dosage of electrolyte, thereby increasing the sulfur utilization as well as reducing the dissolution of polysulfide into the electrolyte. As a result, the pouch cells paired with the sulfur/carbon cathode and Li metal anode deliver superior specific capacity and remarkable cycling performance, which is attributable to the better contact between particles and the faster redox kinetics. This work reveals the contribution of the compaction density of the sulfur cathode to the electrochemical performance of the Li-S battery, providing an instructive paradigm for the rational design of an advanced sulfur cathode for large-scale commercialized Li-S pouch cells.
研究领域:
材料科学
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能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
Chemistry-An Asian Journal
·
2021
·Vol. 16
·期 15
·2146-2153
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IF 4.568
Liling Lei,Yiwei Zheng,Xichen Zhang,Yutian Su,Xi Zhou,Shishan Wu,Jian Shen
Graphical A new zinc-ion hybrid capacitor assembled by using a Zn@annealed ZIF-8 anode and ZIF-8 derived C cathode provides a capacity of 135.5 mAh g −1 and an energy density of 108.4 Wh kg −1 with a power density of 800 W kg −1 at 1.0 A g −1 . Zn is a promising anode for aqueous energy storage owing to it intrinsic superior properties such as large capacity, abundant reserves, low potential and safety. But, the growth of dendrites during charge and discharge leads to a decrease in reversibility. In addition, further development of zinc-ion hybrid capacitors (ZICs) is seriously challenging because of the lack of an exceptional cathode. Herein, we use ZIF-8 annealed at 500 °C (annealed ZIF-8) as a host material for stable and dendrite-free Zn anodes. Utilization of annealed ZIF-8 results in dendrite-free Zn deposition and stripping as a result of its porous construction, which contains trace Zn. Furthermore, we firstly proposed innovative N,O dual-doped carbon which was designed by the derived ZIF-8 (ZIF-8 derived C) as cathode for high-energy and power-density ZICs. The new ZIC assembled by Zn@annealed ZIF-8 anode and ZIF-8 derived C cathode provides a capacity of 135.5 mAh g −1 and an energy density of 108.4 Wh kg −1 with a power density of 800 W kg −1 at 1.0 A g −1 . In addition, it shows outstanding cycling stability of 91% capacity retention after 6000 cycles at 5.0 A g −1 . Moreover, the solid-state ZICs can drive LEDs and smart watches. This ZIC holds promise for the practical application of supercapacitors.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
DOI
高影响因子
Small
·
2024
·Vol. 20
·期 29
·2310978
·
IF 13
Chenyu Ma,Wenting Feng,Debin Kong,Xinru Wei,Xuelei Gong,Jianhang Yang,Junwei Han,Linjie Zhi
Rechargeable sodium chloride (Na-Cl 2 ) batteries have emerged as promising alternatives for next-generation energy storage due to their superior energy density and sodium abundance. However, their practical applications are hindered by the sluggish chlorine cathode kinetics related to the aggregation of NaCl and its difficult transformation into Cl 2 . Herein, the study, for the first time from the perspective of electrode level in Na-Cl 2 batteries, proposes a free-standing carbon cathode host with customized vertical channels to facilitate the SOCl 2 transport and regulate the NaCl deposition. Accordingly, electrode kinetics are significantly enhanced, and the deposited NaCl is distributed evenly across the whole electrode, avoiding the blockage of pores in the carbon host, and facilitating its oxidation to Cl 2. With this low-polarization cathode, the Na-Cl 2 batteries can deliver a practically high areal capacity approaching 4 mAh cm −2 and a long cycle life of over 170 cycles. This work demonstrates the significance of pore engineering in electrodes for mediating chlorine conversion kinetics in rechargeable alkali-metal-Cl 2 batteries.
研究领域:
电化学
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能源材料
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纳米结构材料
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储能技术
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电极工程
✓ 已验证
DOI
高影响因子
Batteries & Supercaps
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2022
·Vol. 5
·期 4
·e202100318
·
IF 6.043
Tuo Xin,Qiuju Xu,Xiangcheng Yuan,Qi Zhang,Meinan Liu,Jinzhang Liu
Graphical Zinc-ion hybrid supercapacitor : An organic cathode is made by electrodepositing poly(4,4’-thiodianiline) onto a nanoporous activated carbon coating and is combined with Zn anode to make a hybrid aqueous energy storage device that combines merits of both ionic battery and supercapacitor. The Zn 2+ based battery systems have attracted considerable interest because of the bivalent ions as charge carriers and merits of Zn anode. Herein, we demonstrate a Zn-ion hybrid energy storage device consisting of a Zn anode and a cathode made of poly(4,4’-thiodianiline)-coated activated carbon (AC). This redox-active polymer that is electrodeposited onto nanoporous AC granules has the function of boosting the energy storage capacity, reaching 181.3 mAh g −1 . The Zn-ion cell exhibits good cycling stability, as the capacity retention is 83 % after 5000 cycles. Aqueous electrolytes using different zinc salts are prepared and their influences on the formation of byproducts and cycling stability of the cell are investigated. The charge/discharge mechanism of the polymer cathode is discussed in detail. Moreover, for practical applications, bending tests are performed on the flexible Zn-ion cell, and it remains stable capacity when being repeatedly bent.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Zirui Li,Zhengjie Chen,Dong Ouyang,Xiaowei Gan,Junyu Qu,Chenguang Han,Shilong Ye,Wenhui Ma
Spent carbon cathode (SCC) is a recyclable hazardous solid waste generated from electrolytic aluminum production. In this study, a combined leaching process involving mixed molten salt roasting and ultrasonic-thermal pressure was proposed to purify graphite and repair the lattice structure of waste cathodes. The results showed that the mixed molten salt system reduced the reaction temperature of the impurities in the waste cathode and that adding an ultrasonic pretreatment step shortened the subsequent hot-pressing acid leaching time. It also lowered the reaction temperature, and the fixed carbon content of the product increased from 99.81% to 99.86%. X-ray diffraction (XRD), Raman spectroscopy, BET, and particle size tests showed that ultrasonic pretreatment did not damage the graphite crystal structure and even promoted the repair of the graphite lattice while destroying the porous structure of the waste cathode and removing impurities between graphite layers. This study provides a solution to the high energy consumption and graphite structure damage during the recycling of waste cathode graphite and achieves a dual effect of impurity removal and structure repair. It also provides new experimental data for designing other waste graphite purification processes.
研究领域:
环境工程
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材料科学
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冶金工程
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化学工程
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声学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Ziqi Dang,Xu Li,Yang Li,Liubing Dong
Aqueous zinc-ion hybrid supercapacitors (ZHSs) are attracting increased attention as emerging electrochemical energy storage systems. However, the design of high-performance carbon cathodes for ZHSs remains a challenge. Herein, we report the synthesis of heteroatom-rich carbon cathodes based on a biomass precursor of yeast and a hydrothermal pre-carbonization strategy, realizing high-performance ZHSs. The yeast is composed of polysaccharide chains containing abundant O/N heteroatoms, and a hydrothermal pre-carbonization process is conducive to preserving these heteroatoms in the high-specific-surface-area carbon materials obtained by carbonizing-activating the yeast precursor. As a result, the synthesized carbon materials are endowed with high O/N heteroatom contents (exceeding 13.9 at%), and present superior electrochemical performance in ZHSs, including a high specific capacity of 132 mAh/g, a high energy density of 94.4 Wh/kg and outstanding cycling stability with ∼100% capacity retention after 7000 cycles at 5 A/g. Besides, the heteroatom-rich carbon cathodes show a high capacity retention of 85.3% when their mass loading increases from 3.8 to 12.2 mg/cm 2 , demonstrating promising application for practical ZHSs. Electrochemical analysis reveals that the O/N heteroatoms promote ion chemical adsorption and thus the electrochemical properties of the carbon cathodes. Furthermore, flexible ZHS devices constructed with the heteroatom-rich carbon cathodes and a biodegradable ZnSO 4 /dough solid-state electrolyte exhibit excellent flexibility (as reflected by almost unchanged capacity under different bending states and 85% capacity retention after 500 bending cycles) as well as good repairability after dehydration under abnormal environments. This study offers new thinking in designing high-performance carbon cathodes and promotes nonflexible/flexible ZHSs moving towards practical applications.
研究领域:
材料科学
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能源存储
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Fulian Kang,Yang Li,Zhiyuan Zheng,Xinya Peng,Jianhua Rong,Liubing Dong
Aqueous Zn-ion hybrid supercapacitors (ZHSs) are attracting significant attention as a promising electrochemical energy storage system. However, carbon cathodes of ZHSs exhibit unsatisfactory ion storage performance due to the large size of hydrated Zn-ions ( e.g. , [Zn(H 2 O) 6 ] 2+ ), which encumbers compact ion arrangement and rapid ion transport at the carbon-electrolyte interfaces. Herein, a porous carbon material (HMFC) with abundant sub-nanopores is synthesized to optimize the ion storage performance of the carbon cathode in ZHSs , in which the sub-nanopores effectively promote the dehydration of hydrated Zn-ions and thus optimize the ion storage performance of the carbon cathode in ZHSs . A novel strategy is proposed to study the dehydration behaviors of hydrated Zn-ions in carbon cathodes, including quantitatively determining the desolvation activation energy of hydrated Zn-ions and in-situ monitoring active water content at the carbon-electrolyte interface. The sub-nanopores-induced desolvation effect is verified, and its coupling with large specific surface area and hierarchically porous structure endows the HMFC cathode with improved electrochemical performance, including a 53 % capacity increase compared to the carbon cathode counterpart without sub-nanopores, fast charge/discharge ability that can output 46.0 Wh/kg energy within only 4.4 s, and 98.2 % capacity retention over 20,000 charge/discharge cycles. This work provides new insights into the rational design of porous carbon cathode materials toward high-performance ZHSs.
研究领域:
材料科学
·
电化学
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能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY
·
2025
·
IF 9.4
Xiaowei Chen,Zhengjie Chen,Xiuhua Chen,Yonghang Zhang,Jianjiao Xiong,Shilong Ye,Yaqi Zhao,Pen Luo,Xiaowei Gan,Shaoyuan Li,Wenhui Ma
Spent carbon cathode (SCC), a solid waste produced by the electrolytic aluminum industry mainly consists of graphite and contains various fluorides that pose significant threats to both the environment and human health. According to the primary aluminum production of 69.7587 million tons, as reported by the World Bureau of Metal Statistics, over 1 million tons of SCC were generated globally in 2023 alone. The traditional treatment method for SCC involves breaking the chemical bonds of fluoride at high temperatures or in alkaline/acidic environments to achieve purification and recovery of SCC. However, given the large volume of SCC, the use of traditional treatment methods imposes significant environmental pressures. Therefore, this article proposes a recycling strategy that combines low energy consumption with a clean process. (NH 4 ) 2 SO 4 is used as an additive, and through mechanical activation pretreatment, defluorination purification of SCC is achieved at a low temperature of 320 °C, resulting in graphite with a purity of 99.81 %. When used as the negative electrode in lithium-ion batteries, the purified graphite demonstrates excellent lithium-ion storage performance, including a high reversible capacity (e.g., 443.0 mAh ∙ g −1 at 0.1C), excellent rate performance (e.g., 330.81 mAh ∙ g −1 at 1C), and long-term cycling stability (e.g., 85.57 % capacity retention after 350 cycles at 1C), which fully harnesses the unique properties of recycled graphite.
研究领域:
材料科学
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储能技术
·
回收技术
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环境工程
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Jilong Wang,Qi Xiang,Ye Han,Zeyu Ma,Wei Cheng,Jie Sun,Shaobin Wang
To overcome the limitations of traditional Electro-Fenton (EF) in natural waters, such as low conductivity and metal ion leaching, we developed a novel metal-free EF system incorporating solid polymer electrolytes (EF-SPE). Nitrogen-doped carbon cathodes, optimized via calcination (e.g., 800 °C), enabled efficient in-situ H 2 O 2 electro-generation and activation for carbamazepine (CBZ) degradation. This EF-SPE system achieved a CBZ degradation half-life of 10 min (k = 0.052 min −1 ), operated effectively across a broad pH range (3–9), and exhibited low specific energy consumption for mineralization (6.73 kWh·m −3 ). Experimental and computational studies reveal that graphitic N and pyridinic N were the primary active sites for the electro-generation of H 2 O 2 and its activation to •OH, respectively. The system demonstrated universal efficacy for various pharmaceuticals and personal care products in different natural waters, showcasing its potential for sustainable water purification.
研究领域:
环境科学
·
水处理技术
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电化学
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材料科学
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污染物降解
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可持续技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Wei Wang,Liu-Liu Shen,Peiran Wu,Hui Yu,Jiansong Wang,Yipu Xu,Xiangzun Dong,Xuanxuan Cui,Gui-Rong Zhang,Donghai Mei
Capillary microfluidics on porous substrates emerges as an innovative platform for constructing miniaturized electronics. However, maintaining a steady flow within microfluidics remains challenging, thus limiting their practical applications. Inspired by plant transpiration, this work presents a novel wood-based microfluidic Al-air battery (μAAB) configuration driven by a photothermal evaporator (biomimetic “leaf”). Except for the Al anode, the μAAB features an all-wood design, utilizing the well-aligned microchannels of the natural wood for electrolyte transportation, partially charred wood as photothermal evaporator for flow regulating, and wood-derived self-standing carbon cathode for the oxygen reduction reaction. These components are assembled through mortise-and-tenon joints, and the resulting μAAB exhibits a remarkable peak power density of 230 mW cm −3 . The superior performance stems from the boosted mass transfer, maximized electrochemical interface and minimized depletion boundary layer provided by the 3D channeled structure of the wood-derived cathode. A steady discharge for over 11 h (200 mA cm −3 ) is obtained via the continuous electrolyte flow which is facilitated by the photothermal evaporator in the μAAB. This work not only presents a novel concept for miniaturized microfluidic power sources but also highlights the potential of 3D wood-based microfluidics combined with solar energy utilization.
研究领域:
材料科学
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能源技术
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微流控
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可持续能源
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仿生学
·
电化学
✓ 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）