Lithium-ion batteries(LIBs)are the most popular energy storage devices due to their high energy density,high operating voltage,and long cycle life.However,green and effective recycling methods are needed because LIBs ...Lithium-ion batteries(LIBs)are the most popular energy storage devices due to their high energy density,high operating voltage,and long cycle life.However,green and effective recycling methods are needed because LIBs contain heavy metals such as Co,Ni,and Mn and organic compounds inside,which seriously threaten human health and the environment.In this work,we review the current status of spent LIB recycling,discuss the traditional pyrometallurgical and hydrometallurgical recovery processes,and summarize the existing short-process recovery technologies such as salt-assisted roasting,flotation processes,and direct recycling.Finally,we analyze the problems and potential research prospects of the current recycling process,and point out that the multidisciplinary integration of recycling will become the mainstream technology for the development of spent LIBs.展开更多
The study in the past shows that the listed companies in China have the actions of manipulating profit to cater for the requirement of the Chinese Securities Regulatory Commission, manage earnings by means of dealings...The study in the past shows that the listed companies in China have the actions of manipulating profit to cater for the requirement of the Chinese Securities Regulatory Commission, manage earnings by means of dealings or managing the accrued profit items, so as to acquire the competence of rights issue, or lessen the risk of being suspended or canceled of trading. In this paper, the case analysis on earnings management based on rights issue right of listed companies is carded out with the samples of data from the listed companies of A-share from 1996 to 2001 and by means of earnings distributing, so as to prove the listed companies＇ response to the policies of rights issue and the existence of earnings management conducted by the rights issue companies for the purpose of rights issue, and observe the effectiveness of the securities market in China.展开更多
基金financial support by the National Natural Science Foundation of China(No.52374293)Zhongyuan Science and Technology Innovation Leading Talent Project,China(No.224200510025)+1 种基金the Science and Technology Innovation Program of Hunan Province,China(No.2022RC1123)One of the authors,Hong-bo ZENG,gratefully acknowledges the support from the Natural Sciences and Engineering Research Council of Canada(NSERC)and the Canada Research Chairs Program.
文摘Lithium-ion batteries(LIBs)are the most popular energy storage devices due to their high energy density,high operating voltage,and long cycle life.However,green and effective recycling methods are needed because LIBs contain heavy metals such as Co,Ni,and Mn and organic compounds inside,which seriously threaten human health and the environment.In this work,we review the current status of spent LIB recycling,discuss the traditional pyrometallurgical and hydrometallurgical recovery processes,and summarize the existing short-process recovery technologies such as salt-assisted roasting,flotation processes,and direct recycling.Finally,we analyze the problems and potential research prospects of the current recycling process,and point out that the multidisciplinary integration of recycling will become the mainstream technology for the development of spent LIBs.
文摘The study in the past shows that the listed companies in China have the actions of manipulating profit to cater for the requirement of the Chinese Securities Regulatory Commission, manage earnings by means of dealings or managing the accrued profit items, so as to acquire the competence of rights issue, or lessen the risk of being suspended or canceled of trading. In this paper, the case analysis on earnings management based on rights issue right of listed companies is carded out with the samples of data from the listed companies of A-share from 1996 to 2001 and by means of earnings distributing, so as to prove the listed companies＇ response to the policies of rights issue and the existence of earnings management conducted by the rights issue companies for the purpose of rights issue, and observe the effectiveness of the securities market in China.
