Article
Engineering, Chemical
Lea M. J. Rouquette, Martina Petranikova, Nathalia Vieceli
Summary: The necessity of a feasible process for recycling lithium-ion batteries is evident due to high demand for raw materials and regulatory requirements. In this study, a selective recovery of lithium using oxalic acid was investigated. Optimal parameters of 60°C, 60 min, and 0.6 M oxalic acid resulted in a 98.8% yield for lithium, while cobalt, nickel, and manganese had minimal leaching. This method can significantly improve lithium recovery in current recycling processes, with the added advantage of complete dissolution of aluminum.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Energy & Fuels
Michael T. Castro, Julie Anne D. Del Rosario, Meng Nan Chong, Po-Ya Abel Chuang, Jaeyoung Lee, Joey D. Ocon
Summary: The increasing demand for batteries in various applications has led to research efforts focused on improving their performance and safety features. Multiphysics modeling plays a key role in investigating battery research, with established fundamental electrochemical models and ongoing development of new models for specific applications. Integration of new concepts in multiphysics modeling requires consideration of phenomena beyond the continuum scale.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Engineering, Chemical
Pengcheng Hu, Yimin Zhang
Summary: This study investigated the separation mechanism of iron impurity in the process of vanadium extraction from shale. By using oxalic acid to separate vanadium and iron, a high-purity FeC2O4.2H2O product can be obtained.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Physical
Luyao Wang, Nannan Xue, Yimin Zhang, Pengcheng Hu
Summary: In this study, the reusability of D418 aminophosphonic chelating resin for vanadium enrichment from acid leaching solution of black shale was investigated using oxalic acid as regenerant. The results showed that the exhausted resin could be efficiently regenerated and the vanadium adsorption efficiency increased.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Physical
Pengcheng Hu, Yimin Zhang, Qiushi Zheng
Summary: This study investigates the separation mechanism of vanadium from iron impurity during vanadium extraction from black shale using oxalic acid. It reveals that oxalic acid can react with iron impurity, forming a ferrous oxalate passivation layer on pyrite surface, which inhibits the dissolution of pyrite and enhances vanadium purity. Density functional theory calculations show that oxalic acid can reconstruct the surface of pyrite and form a stable passivation layer, reducing the reactivity of iron atoms.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Multidisciplinary
Yunkai Xu, Xianyong Wu, Sean K. Sandstrom, Jessica J. Hong, Heng Jiang, Xin Chen, Xiulei Ji
Summary: VOPO4 ·2H2O demonstrates a high specific capacity and stable cycling performance for hosting Fe2+ ions, while the capacity for hosting Zn2+ ions diminishes quickly. The unique mechanism of trapping Fe3+ ions in the electrode structure prevents dissolution into the electrolyte during charge and discharge cycles, offering a new strategy to stabilize layered electrode materials using a redox-active ion charge carrier.
ADVANCED MATERIALS
(2021)
Article
Engineering, Environmental
Ye He, Yimin Zhang, Qiushi Zheng, Jing Huang, Hong Liu, Liuhong Zhang
Summary: In this study, a stripping method was proposed for vanadium extraction using the H2C2O4-H2SO4 system to strip vanadium from the chelating extractant. The results showed that under optimized conditions, a high vanadium stripping percentage and concentration in the stripping solution could be achieved. Furthermore, the extraction efficiency remained high even after multiple cycles, indicating the feasibility of this method. The mechanism of stripping was analyzed, and it was found that H2C2O4 and H+ played important roles in the reduction and replacement of V(IV).
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Wang Li, Xudong Yan, Zepeng Niu, Xiaobo Zhu
Summary: Selective leaching of vanadium and separation of iron from red mud using oxalic acid and sodium sulfite were studied, showing that over 90% of vanadium could be selectively leached under suitable conditions. The leaching mechanism was analyzed with XRD, SEM-EDS, thermodynamic theory, and leaching kinetics, demonstrating controlled diffusion and chemical reaction processes for vanadium and iron leaching, respectively. The apparent activation energy of vanadium and iron were determined and the presence of stable complexes in the leaching solution was identified.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Hao Peng, Dan Tang, Miao Liao, Yuting Wu, Xiaoyi Fan, Bing Li, Huisheng Huang, Wenbing Shi
Summary: Water pollution poses a significant threat to ecosystems and the environment. Effective wastewater treatment, using oxalic acid as a reductant, is crucial in minimizing pollutant levels. This study successfully reduced nearly 100% of vanadium in wastewater using selected reaction conditions. Optimization results showed that all parameters, with oxalic acid dosage being the most significant, influenced the reduction process. The reduction behavior analysis suggested that the pseudo first-order kinetics model accurately described the process, with an activation energy of 42.14 kJ/mol.
Article
Engineering, Chemical
Min Huang, Changyin Zhu, Fengxiao Zhu, Guodong Fang, Dongmei Zhou
Summary: This study demonstrates that the addition of oxalic acid can significantly enhance the degradation efficiency of DEP in VO2-Fenton-like reactions, promoting the formation of reactive species such as center ·OH and thus facilitating pollutant degradation. Addition of reducing agents plays a crucial role in enhancing Fenton-like reactions for pollutant degradation and environmental remediation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Physical
Xiaoying Luo, Xuexia Wei, Cunhao Zhang, Jiaqi Huang, Xuan Cheng
Summary: Surface, interface, and microstructure studies were conducted on a modified carbon-coated lithium iron silicate composite with 15% vanadium modification to understand its enhanced electrochemical performance. The study confirmed the presence of amorphous carbon coating on the composite surface and a change in the predominant crystal phase after vanadium modification. Multi-peak fitting analysis of X-ray photoelectron spectroscopy spectra identified the simultaneous presence of multivalent iron and vanadium ions. The detailed characterization of microstructure, interface, and surface provided strong evidence for the partial substitution of divalent iron with divalent vanadium and the surface modification by vanadium, resulting in increased total carbon content and improved charge transfer kinetics.
SURFACES AND INTERFACES
(2022)
Article
Green & Sustainable Science & Technology
Chunyuan Yang, Jiawei Wang, Pan Yang, Yue He, Song Wang, Pingyuan Zhao, Haifeng Wang
Summary: This study successfully recovered valuable metals from spent lithium-ion batteries using sulfuric acid and oxalic acid as compound leaching agents, providing an important reference for new methods of recycling spent batteries.
Article
Chemistry, Physical
Xiaofei Sun, Zikang Wang, Meijuan Li, Wenjun Wang, Kai Zhu, Xuesong Mei
Summary: A new type of mixed-polyanion LiV (SixP1_xO4)F/C (0 < x < 1) is designed and explored, serving as a promising cathode material for LIBs with better thermal stability and higher theoretical specific energy. The optimized material shows significantly enhanced electrochemical performance, demonstrating the significance and feasibility of polyanion regulation for high-performance polyanionic battery materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Metallurgy & Metallurgical Engineering
Ankit Verma, David R. Corbin, Mark B. Shiflett
Summary: This study developed a kinetic investigation of a closed-loop oxalate-based process for recovering and separating Li and Co, and demonstrated that the addition of hydrogen peroxide significantly reduces energy consumption and reagent costs.
Article
Chemistry, Multidisciplinary
Li He, Xiaoya Zhang, Di Yang, Jiayu Li, Meiling Wang, Siyu Liu, Jingyi Qiu, Teng Ma, Junjie Ba, Yizhan Wang, Yingjin Wei
Summary: Defective two-dimensional transition metal dichalcogenidescan be efficient electrocatalysts for Li-S batteries. In this study, S vacancy-type S-V-VS2 and V self-intercalated-type V(I)-VS2 were designed and their catalytic activities were measured. It was found that S-V-VS2 had better adsorption and catalytic activity than V-I-VS2. Li-S batteries with S-V-VS2-coated separators exhibited high rate performance and excellent cycling stability.
Article
Chemistry, Multidisciplinary
Yutong Lin, Fangshuo Zhou, Mingxue Xie, Sen Zhang, Chao Deng
Article
Engineering, Environmental
Yutong Lin, Fangshuo Zhou, Meng Chen, Sen Zhang, Chao Deng
CHEMICAL ENGINEERING JOURNAL
(2020)
Article
Engineering, Environmental
Hongmei Wang, Yang Zhou, Sen Zhang, Chao Deng
Summary: The lotus root-like nanofibers composed of Co3O4-x bubbles with engineered defects serve as a novel cathode for hybrid Zn batteries, providing fast electron/ion transport, highly reversible redox reactions, and abundant active sites for oxygen evolution/reduction reactions. This unique structure enables high energy/power density, superior durability and efficient kinetics, resulting in a fiber-shaped HZB with high energy density, superior high-rate capability, and long-term cycling stability under various conditions.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Nanoscience & Nanotechnology
Xiaolong Li, Chao Deng, Hongmei Wang, Jiaqi Si, Sen Zhang, Bing Huang
Summary: This study introduces a new method using core-shell hybrid fibers filled with metal nitride as a self-supporting anode for batteries, providing high stability in both lithium-ion and sodium-ion batteries. The approach shows potential for improving battery performance and offers new insights into the fabrication of efficient structures for functional materials.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Environmental
Hongmei Wang, Chao Deng, Xiaolong Li, Dukang Yan, Mingxue Xie, Sen Zhang, Bing Huang
Summary: By utilizing a dual-polysulfide-defending system and hierarchical polar electrodes, the RT-Na/S battery achieves superior performance and long-term stability.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Dukang Yan, Bing Han, Zili Wang, Yiying Shao, Yu Wu, Chao Deng, Meng Chen, Sen Zhang
Summary: This study presents a freestanding fiber as an anode for potassium-ion hybrid capacitors (PIHCs). The anode exhibits high porosity and conductivity, as well as the ability to accommodate large volume change. The phase of nickel sulfide inside the fiber is engineered, and its performance is carefully evaluated. Experimental results show that the anode has superior kinetics and durability. Moreover, the complete PIHC based on this anode achieves high energy/power densities and excellent high-rate long-term performance.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Engineering, Environmental
Mingxue Xie, Yang Zhou, Zili Wang, Hongmei Wang, Dukang Yan, Bing Han, Sen Zhang, Chao Deng
Summary: A hollow fiber electrode composed of S, N-doped carbon nanotubes confined nickel sulfide nanoparticles was designed for hybrid Zn batteries, exhibiting high electrocatalytic performance. The electrode provides fast electron/ion pathways, abundant active sites, and superior OER/ORR catalytic activities, promoting the development of high-performance power sources for electronics.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Yang Zhou, Mingxue Xie, Yu Song, Dukang Yan, Zili Wang, Sen Zhang, Chao Deng
Summary: This study presents a hollow fiber constructed from carbon nanotubes with single-atomic Ni-N-4 sites, which demonstrate superior activities in oxygen electrocatalysis and CO2 conversions. The highly porous and conductive framework of the hollow fiber provides abundant active sites and fast kinetics. Moreover, a flexible Zn-air battery assembled with the hollow fiber exhibits good flexibility, high power/energy density, and stable performance at both ambient and freezing temperatures.
ENERGY STORAGE MATERIALS
(2022)
Article
Chemistry, Applied
Yutong Lin, Bing Han, Donglan Zhang, Xueya Liu, Zili Wang, Zhengyu Wang, Liang Si, Sen Zhang, Chao Deng
Summary: A novel potassium mediated iron/manganese binary hexacyanoferrate nano-cuboid with a concentration-gradient structure was designed as a high-performance cathode for aqueous potassium-ion battery (AKIB). The concentration-gradient structure exhibited lower internal stress and better mechanical characteristics, and the substitution of Fe with Mn enhanced electronic conductivity, potassium migration, and electrochemical kinetics. The CG-KFe0.31Mn0.69HCF achieved superior rate capability and ultrahigh stability in AKIBs, making it suitable for diverse electronics and working environments.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Chemistry, Physical
Yang Zhou, Yukun Liu, Zili Wang, Caiyun Li, Zhengyu Wang, Sen Zhang, Chao Deng
Summary: In this study, hollow fibers composed of carbon nanobubbles with N, P heteroatom codopants and Fe-Co dual atomic sites were designed and realized. The FeCo-NPC catalyst showed excellent catalytic activity and stability for oxygen reduction/evolution reactions. The fabricated Zn-air battery based on FeCo-NPC BAH cathode achieved high energy density and good cycling stability. The flexible solid-state ZAB with polymer electrolyte and 3D carbon matrix@Zn anode exhibited superior reliability, durability, and adaptability.
ENERGY STORAGE MATERIALS
(2023)
Article
Chemistry, Physical
Yu Wu, Zhengyu Wang, Zili Wang, Xueya Liu, Sen Zhang, Chao Deng
Summary: In this study, a novel ternary cobalt phosphoselenide (CoPSe)@N/P co-doped carbon (NPC) composite with stress-relieved structure is introduced as anodes for potassium-ion hybrid capacitors (PIHCs) and potassium-ion batteries (PIBs). The composite exhibits dual carbon decorations and ultrafine crystals in a ball-in-tyre (BIT) structure, enabling fast electron/ion transports and depressed internal stress. The strong interfacial interaction between CoPSe crystal and N/P codopant carbon matrix enhances the kinetics and stability of the composite. Moreover, the CoPSe@NPC BIT composite shows improved intrinsic conductivity, enhanced potassium adsorption and diffusion capabilities, and demonstrates superior high-rate capability and excellent cycling stability in potassium-ion systems.
ENERGY STORAGE MATERIALS
(2023)
Article
Chemistry, Applied
Zili Wang, Caiyun Li, Yukun Liu, Yu Wu, Sen Zhang, Chao Deng
Summary: This paper introduces a novel bio-cooperative strategy for synthesizing FeNi-DAC catalyst, which exhibits high catalytic activity and good stability in oxygen electrocatalysis. The catalyst has optimized micro-environment and tailor-made substrates, providing a new green approach for preparing highly efficient DACs.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Chemistry, Physical
Bing Han, Donglan Zhang, Xueya Liu, Zili Wang, Weili Qu, Sen Zhang, Chao Deng
Summary: In this study, ordered arrays of potassium mediated Co-Fe based hollow multivoid nanocuboids were used as cathodes for aqueous potassium-ion batteries (AKIBs). The ordered arrangement, hollow structure, and crystal framework of the cathode material facilitated fast kinetics and stable cycling performance. The AKIBs built with this cathode material achieved excellent energy density, power density, and capacity retention even after long-term cycling. Moreover, the pouch-type AKIB showed superior adaptability to temperature changes, operating smoothly at high rates in a wide temperature range.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Physical
Xia Li, Yu Wu, Dukang Yan, Mingxue Xie, Sen Zhang, Chao Deng
Summary: A novel bubble-in-bowl (BIB) structured transition metal phosphide@N,P codoped carbon was introduced as a fast and durable anode for potassium-ion hybrid capacitors (PIHCs), demonstrating fast kinetics and high stability for potassium-ion storage. The construction of CoP@NPC BIB composite using bio-combustion and bio-phosphoration synchronizing provided a facile strategy for efficient structures, leading to high energy/power density, long-life capability, and high reliability in a wide temperature range in PIHC full cells. This work not only offers a new clue for the development of advanced energy storage devices under extended working conditions, but also showcases the potential for application in tailoring other kinds of TMPs into the BIB structure.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Chemistry, Physical
Dukang Yan, Mingxue Xie, Yiying Shao, Meng Chen, Sen Zhang, Chao Deng
Summary: This study presents a general and efficient strategy for building highly durable and superior performance anodes for advanced hybrid capacitors by fabricating ultrafast and highly durable anodes.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)