1
|
Wang Y, Li A, Ren B, Han Z, Lin J, Zhang Q, Cao T, Cui C. Mechanistic insights into soil heavy metals desorption by biodegradable polyelectrolyte under electric field. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 292:118277. [PMID: 34610413 DOI: 10.1016/j.envpol.2021.118277] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 09/29/2021] [Accepted: 09/30/2021] [Indexed: 06/13/2023]
Abstract
In this study, we firstly used alginate to enhance an electrokinetic technology to remediate soil contaminated with divalent heavy metals (Pb2+, Cu2+, Zn2+). The mechanisms of alginate-associated migration of metal ions in electric field were confirmed. Alginate resulted in a high electrical current during electrokinetic process, and soil conductivity also increased after remediation. Obvious changes in both electroosmotic flow and soil pH were observed. Moreover, these factors were affected by increasing alginate dosage. The highest Cu (95.82%) and Zn (97.33%) removal efficiencies were obtained by introducing 1 wt% alginate. Alginate can desorb Cu2+ and Zn2+ ions from soil by forming unstable gels, which could be dissociated through electrolysis. However, Pb2+ ions did not easily migrate out of the contaminated soil. The density functional theory (DFT) calculations show Pb2+ ions could form a more stable coordination sphere in metal complexes than Cu2+ and Zn2+ ions. The metal removal efficiency was decreased by increasing alginate dosage at a high level. More alginate could provide more carboxyl ligands for divalent metal ions to stabilize gels, which were difficult to dissociate by electrolysis. In summary, the results indicate it is potential for introducing alginate into an electrokinetic system to remediate Cu- and Zn- contaminated soil.
Collapse
Affiliation(s)
- Yuchen Wang
- School of Environment, Harbin Institute of Technology, Harbin, 150090, People's Republic of China; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, People's Republic of China
| | - Ang Li
- School of Environment, Harbin Institute of Technology, Harbin, 150090, People's Republic of China; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, People's Republic of China
| | - Binqiao Ren
- School of Environment, Harbin Institute of Technology, Harbin, 150090, People's Republic of China; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, People's Republic of China
| | - Zijian Han
- School of Environment, Harbin Institute of Technology, Harbin, 150090, People's Republic of China; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, People's Republic of China
| | - Junhao Lin
- School of Environment, Harbin Institute of Technology, Harbin, 150090, People's Republic of China; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, People's Republic of China
| | - Qiwei Zhang
- School of Environment, Harbin Institute of Technology, Harbin, 150090, People's Republic of China; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, People's Republic of China
| | - Tingting Cao
- School of Environment, Harbin Institute of Technology, Harbin, 150090, People's Republic of China; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, People's Republic of China
| | - Chongwei Cui
- School of Environment, Harbin Institute of Technology, Harbin, 150090, People's Republic of China; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, People's Republic of China.
| |
Collapse
|
2
|
Wang W, Li Y, Wang Y, Huang W, Lv L, Zhu G, Qu Q, Liang Y, Zheng W, Zheng H. A novel covalently grafted binder through in-situ polymerization for high-performance Si-based lithium-ion batteries. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.139442] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
3
|
Wang W, Wang Y, Huang W, Zhou M, Lv L, Shen M, Zheng H. In Situ Developed Si@Polymethyl Methacrylate Capsule as a Li-Ion Battery Anode with High-Rate and Long Cycle-Life. ACS APPLIED MATERIALS & INTERFACES 2021; 13:6919-6929. [PMID: 33513001 DOI: 10.1021/acsami.0c21838] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The development of Si-based lithium-ion batteries is restricted by the large volume expansion of Si materials and the unstable solid electrolyte interface film. Herein, a novel Si capsule with in situ developed polymethyl methacrylate (PMMA) shell is prepared via microemulsion polymerization, in which PMMA has high lithium conductivity, high elasticity, certain viscosity in electrolytes, as well as good electrolyte retention ability. Taking advantage of the microcapsule structure with the PMMA capsid, the novel Si capsule anode retains 1.2 mA h/cm2 at a current density of 2 A/g after 200 electrochemical cycles and delivers higher than 66% of its initial capacity at 42 A/g.
Collapse
Affiliation(s)
- Wei Wang
- College of Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215006, PR China
| | - Yan Wang
- College of Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215006, PR China
- Huaying New Energy Materials. Co., Suzhou, Jiangsu 215000, PR China
| | - Weibo Huang
- College of Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215006, PR China
| | - Mi Zhou
- College of Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215006, PR China
| | - Linze Lv
- College of Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215006, PR China
| | - Ming Shen
- Huaying New Energy Materials. Co., Suzhou, Jiangsu 215000, PR China
| | - Honghe Zheng
- College of Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215006, PR China
- Huaying New Energy Materials. Co., Suzhou, Jiangsu 215000, PR China
| |
Collapse
|
4
|
Heng S, Cao Z, Wang Y, Qu Q, Zhu G, Shen M, Zheng H. In Situ Transformed Solid Electrolyte Interphase by Implanting a 4-Vinylbenzoic Acid Nanolayer on the Natural Graphite Surface. ACS APPLIED MATERIALS & INTERFACES 2020; 12:33408-33420. [PMID: 32584025 DOI: 10.1021/acsami.0c08147] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A solid electrolyte interphase (SEI) layer on a graphite anode plays a crucial role in deciding electrochemical properties of the electrode including the first Coulombic efficiency, rate capability, operating temperature, and long-term cycling stability. However, the ultrathin functional SEI layer is always naturally grown via electrolyte reduction decomposition reactions. Herein, we report a new strategy of in situ transformed solid electrolyte interphase of high stability by implanting a 4-vinylbenzoic acid (4-VBA) nanolayer on a mildly oxidized graphite surface. A 4-VBA layer of 40 nm contributes to the transformation of a robust and stable SEI layer, which not only significantly enhances the overall electrochemical performances of the natural graphite electrode but also greatly prolongs the cycle life of the full cell with the LiNi0.6Co0.2Mn0.2O2 cathode. The effectively suppressed surface evolution aroused from the stable organic SEI transformed from the implanted 4-VBA nanolayer explains the enhanced electrochemical properties.
Collapse
Affiliation(s)
- Shuai Heng
- College of Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215006, P. R. China
| | - Zhang Cao
- College of Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215006, P. R. China
| | - Yan Wang
- College of Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215006, P. R. China
| | - Qunting Qu
- College of Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215006, P. R. China
| | - Guobin Zhu
- College of Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215006, P. R. China
- Huaying New Energy Materials Co., Suzhou, Jiangsu 215000, P. R. China
| | - Ming Shen
- Huaying New Energy Materials Co., Suzhou, Jiangsu 215000, P. R. China
| | - Honghe Zheng
- College of Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215006, P. R. China
- Huaying New Energy Materials Co., Suzhou, Jiangsu 215000, P. R. China
| |
Collapse
|