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6 results on '"Songming Zheng"'

1. A review of cathode and electrolyte recovery from spent lithium-ion batteries: Recent technologies, processes and policies

Author

Songming Zheng, Tao Chen, Yujie Fang, Chang He, Huamei Duan, Shan Ren, and Chunbao Charles Xu

Subjects
Spent lithium-ion batteries, Recovery, Recycling technologies, Materials, Policies, Chemical technology, TP1-1185
Abstract

Recently, lithium-ion batteries (LIBs), due to their superior performance, have been vastly applied in electronic, auto, and other industries, resulting in the generation of an increasing amount of spent LIBs. What's worse, LIBs contained potentially toxic substances, including heavy metals, toxic and flammable electrolyte containing LiBF4, LiClO4, and LiPF6. Conventional disposal of spent LIBs via landfill or incineration exerts tremendous pressure on the environment. It was necessary to adopt efficient, low-cost, and environmentally friendly approaches to valorizing spent LIBs, which could not only alleviate the shortage of rare resources by recycling valuable elements such as Cu, Li, Mn, Ni, Co, and Al, but also eliminate the pollution of harmful components in batteries and realize the recycling and sustainable industry related to consumer electronics and electric vehicles (EVs). Given this, this paper summarized the recycling technologies of spent LIBs, including pyrometallurgy (melting reduction and roasting methods) and hydrometallurgy (leaching, precipitation, extraction, ion-exchange, electrochemical, sol-gel methods), and electrolyte recycling (organic solvent extraction and supercritical extraction methods). Pyrometallurgy technologies had relatively decent metal recovery rates but were associated with high energy consumption and atmospheric emission issues. Hydrometallurgical technologies were more environmentally friendly and efficient in recovering spent LIBs, although disposing of the wastewater generated from the process remained a challenge. In addition, the different industrial processes and various countries’ related policies of recycling spent LIBs were investigated. In the end, the outlooks and future directions of recycling spent LIBs were proposed.

Published
2024
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3. Isolation of hierarchical cellulose building blocks from natural flax fibers as a separation membrane barrier

Author

Zhang Kaiwei, Songming Zheng, Yuqing Liu, and Jinyou Lin

Subjects
Materials science, Nanofibers, 02 engineering and technology, Biochemistry, Nanomaterials, Nanocomposites, 03 medical and health sciences, chemistry.chemical_compound, Crystallinity, Ultraviolet visible spectroscopy, Structural Biology, Flax, Cellulose, Fourier transform infrared spectroscopy, Molecular Biology, 030304 developmental biology, 0303 health sciences, Filter paper, Cell Membrane, General Medicine, 021001 nanoscience & nanotechnology, Membrane, chemistry, Chemical engineering, 0210 nano-technology, Ternary operation, Oxidation-Reduction
Abstract

Cellulose nanofibrils (CNF) is a natural nanomaterial composed of biomacromolecules that can be extracted from plants and has great potential applications in many fields due to its excellent regenerative, sustainable, and biodegradable properties. In this work, the flax CNF with hierarchical scales was obtained by using the flax fibers (FF) treated with different concentrations of alkaline solution, followed by the TEMPO-mediated ternary oxidation and mechanical treatment. Subsequently, the resultant CNF was implanted on the commercial filter paper as a surface barrier for oil/water preparation. The changes of cellulose crystal form and crystallinity caused by alkali treatment on FF were studied by Fourier transform infrared spectroscopy and X-ray diffraction. Morphological changes of FF before and after alkali treatment were observed. The morphology of obtained CNF was examined. Moreover, the transmittance of the prepared CNF suspension and films was also investigated by a UV spectroscopy. The prepared modified filter paper can effectively separate the oil/water mixture, which gives themselves promise as candidates in practical applications of oil/water separation.

Published
2020

4. [Diagnosis and treatment characteristics of head-wind sha in She medicine]

Author

Guangyi, Zou, Xiangdong, Xu, Songming, Zheng, Lianhe, Yan, Houxing, Lei, Qiao-ling, Zhang, Yingmei, Xiang, Yiping, Ye, and Liwei, Song

Subjects
China, Headache Disorders, Acupuncture Therapy, Humans, Combined Modality Therapy, Drugs, Chinese Herbal
Abstract

The diagnosis and treatment characteristics of head-wind sha in She medicine were analyzed and summarized. By visiting She-nationality villages and towns in Zhejiang province and Fujian province and interviewing hundreds of doctors of She medicine, the sha diagnosis, sha differentiation, experience and theory of treatment were arranged, and a comprehensive summary on theory and application of head-wind sha in She medicine such as pathogeny, name of disease, mechanism, diagnosis, differential diagnosis and treatment was made. It is believed that the methods of diagnosis and treatment in She medicine for head-wind sha could effectively enhance curative effect, safety and patients' quality of life, and the further research should be carried out.

Published
2015

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