Jinhui Li

Bio: Jinhui Li is an academic researcher from Tsinghua University. The author has contributed to research in topics: Electronic waste & Environmental pollution. The author has an hindex of 61, co-authored 359 publications receiving 13334 citations. Previous affiliations of Jinhui Li include City University of Hong Kong & Nanyang Technological University.

Recycling of Spent Lithium-Ion Battery: A Critical Review

Abstract: Lithium-ion battery (LIB) applications in consumer electronics and electric vehicles are rapidly growing, resulting in boosting resources demand, including cobalt and lithium. So recycling of batteries will be a necessity, not only to decline the consumption of energy, but also to relieve the shortage of rare resources and eliminate the pollution of hazardous components, toward sustainable industries related to consumer electronics and electric vehicles. The authors review the current status of the recycling processes of spent LIBs, introduce the structure and components of the batteries, and summarize all available single contacts in batch mode operation, including pretreatment, secondary treatment, and deep recovery. Additionally, many problems and prospect of the current recycling processes will be presented and analyzed. It is hoped that this effort would stimulate further interest in spent LIBs recycling and in the appreciation of its benefits.

Review on remediation technologies of soil contaminated by heavy metals

Abstract: The environmental safety of soil has become severe in China with the boost of industrialization and urbanization. In this paper, on the basis of investigating the status of soil contaminated in China, the remediation technologies of soil contaminated by heavy metals, including physical remediation, chemical remediation and biological remediation were focused. The mechanisms of remediation, strengths and drawbacks, developing trend were reviewed in order to supply reference to the study in this field.

Novel approach to recover cobalt and lithium from spent lithium-ion battery using oxalic acid.

Abstract: With the booming of consumer electronics (CE) and electric vehicle (EV), a large number of spent lithium-ion battery (LIBs) have been generated worldwide. Resource depletion and environmental concern driven from the sustainable industry of CE and EV have motivated spent LIBs should be recovered urgently. However, the conventional process combined with leaching, precipitating, and filtering was quite complicated to recover cobalt and lithium from spent LIBs. In this work, we developed a novel recovery process, only combined with oxalic acid leaching and filtering. When the optimal parameters for leaching process is controlled at 150 min retention time, 95 °C heating temperature, 15 g L(-1) solid-liquid ratio, and 400 rpm rotation rate, the recovery rate of lithium and cobalt from spent LIBs can reach about 98% and 97%, respectively. Additionally, we also tentatively discovered the leaching mechanism of lithium cobalt oxide (LiCoO2) using oxalic acid, and the leaching order of the sampling LiCoO2 of spent LIBs. All the obtained results can contribute to a short-cut and high-efficiency process of spent LIBs recycling toward a sound closed-loop cycle.

Recent Advancements in Flexible and Stretchable Electrodes for Electromechanical Sensors: Strategies, Materials, and Features

Abstract: Stretchable and flexible sensors attached onto the surface of the human body can perceive external stimuli, thus attracting extensive attention due to their lightweight, low modulus, low cost, high flexibility, and stretchability. Recently, a myriad of efforts have been devoted to improving the performance and functionality of wearable sensors. Herein, this review focuses on recent remarkable advancements in the development of flexible and stretchable sensors. Multifunction of these wearable sensors is realized by incorporating some desired features (e.g., self-healing, self-powering, linearity, and printing). Next, focusing on the characteristics of carbon nanomaterials, nanostructured metal, conductive polymer, or their hybrid composites, two major strategies (e.g., materials that stretch and structures that stretch) and diverse design approaches have been developed to achieve highly flexible and stretchable electrodes. Strain sensing performances of recently reported sensors indicate that the appropria...

Minimizing the increasing solid waste through zero waste strategy

Abstract: Increasing population, booming economy, rapid urbanization and the rise in community living standards have significantly accelerated the solid waste generation in the world. Solid waste has become one of the global environmental issues. Continuous depletion of natural finite resources is leading the globe to an uncertain future. To prevent further depletion of global resources, sustainable consumption and a strategic waste management system would be required. One approach that has been suggested as a means of addressing these concerns is that of the concepts of “Zero Waste”. However, transforming currently over-consuming activities into zero waste is still challenging. In this study, the challenges of solid waste (focusing on industrial waste e-waste, food waste and packaging waste), zero waste practices, and zero waste strategy were discussed to analyze the challenges and opportunities to transform traditional waste management toward zero waste vision. “Zero Waste” is a good solution to minimizing the increasing solid waste. However, in order to minimize the solid waste, there are still more endeavors need to be done in future.

A review on circular economy: the expected transition to a balanced interplay of environmental and economic systems

Abstract: El articulo muestra un estudio en donde se proporciona una revision extensa de la literatura de las dos ultimas decadas, con el proposito de captar las principales caracteristicas y perspectivas de la CE (Economia circular): origenes, principios basicos, ventajas y desventajas, Modelado e implementacion de CE en los diferentes niveles (micro, meso y macro) en todo el mundo. Los resultados demuestran que los origenes de la CE se basan principalmente en la economia ecologica y Ecologia industrial.

Conceptualizing the circular economy: An analysis of 114 definitions

Abstract: The circular economy concept has gained momentum both among scholars and practitioners. However, critics claim that it means many different things to different people. This paper provides further evidence for these critics. The aim of this paper is to create transparency regarding the current understandings of the circular economy concept. For this purpose, we have gathered 114 circular economy definitions which were coded on 17 dimensions. Our findings indicate that the circular economy is most frequently depicted as a combination of reduce, reuse and recycle activities, whereas it is oftentimes not highlighted that CE necessitates a systemic shift. We further find that the definitions show few explicit linkages of the circular economy concept to sustainable development. The main aim of the circular economy is considered to be economic prosperity, followed by environmental quality; its impact on social equity and future generations is barely mentioned. Furthermore, neither business models nor consumers are frequently outlined as enablers of the circular economy. We critically discuss the various circular economy conceptualizations throughout this paper. Overall, we hope to contribute via this study towards the coherence of the circular economy concept; we presume that significantly varying circular economy definitions may eventually result in the collapse of the concept.

30 Years of Lithium-Ion Batteries.

Abstract: Over the past 30 years, significant commercial and academic progress has been made on Li-based battery technologies. From the early Li-metal anode iterations to the current commercial Li-ion batteries (LIBs), the story of the Li-based battery is full of breakthroughs and back tracing steps. This review will discuss the main roles of material science in the development of LIBs. As LIB research progresses and the materials of interest change, different emphases on the different subdisciplines of material science are placed. Early works on LIBs focus more on solid state physics whereas near the end of the 20th century, researchers began to focus more on the morphological aspects (surface coating, porosity, size, and shape) of electrode materials. While it is easy to point out which specific cathode and anode materials are currently good candidates for the next-generation of batteries, it is difficult to explain exactly why those are chosen. In this review, for the reader a complete developmental story of LIB should be clearly drawn, along with an explanation of the reasons responsible for the various technological shifts. The review will end with a statement of caution for the current modern battery research along with a brief discussion on beyond lithium-ion battery chemistries.

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