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result(s) for
"Cheng, Junfang"
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Revealing the aging process of solid electrolyte interphase on SiOx anode
2023
As one of the most promising alternatives to graphite negative electrodes, silicon oxide (SiO
x
) has been hindered by its fast capacity fading. Solid electrolyte interphase (SEI) aging on silicon SiO
x
has been recognized as the most critical yet least understood facet. Herein, leveraging 3D focused ion beam-scanning electron microscopy (FIB-SEM) tomographic imaging, we reveal an exceptionally characteristic SEI microstructure with an incompact inner region and a dense outer region, which overturns the prevailing belief that SEIs are homogeneous structure and reveals the SEI evolution process. Through combining nanoprobe and electron energy loss spectroscopy (EELS), it is also discovered that the electronic conductivity of thick SEI relies on the percolation network within composed of conductive agents (e.g., carbon black particles), which are embedded into the SEI upon its growth. Therefore, the free growth of SEI will gradually attenuate this electron percolation network, thereby causing capacity decay of SiO
x
. Based on these findings, a proof-of-concept strategy is adopted to mechanically restrict the SEI growth via applying a confining layer on top of the electrode. Through shedding light on the fundamental understanding of SEI aging for SiO
x
anodes, this work could potentially inspire viable improving strategies in the future.
Observing the evolution of the solid electrolyte interphase on SiO
x
-based electrodes in Li-ion batteries is challenging. Here, authors use three-dimensional tomography to visualize the growth of the interphase on single SiO
x
particles and propose a mechanical confinement strategy to prevent aging.
Journal Article
Self‐Activating Integrated Carbon‐Based Air Cathodes With In Situ Oxygen Functionalization for Durable and High‐Performance Metal–Air Batteries
by
Gao, Shulin
,
Cheng, Junfang
,
Bian, Funing
in
integrated air cathode
,
metal‐air batteries
,
ORR/OER
2026
Carbon‐based air cathodes offer low cost, high electrical conductivity, and structural tunability. However, they suffer from limited catalytic activity and inefficient gas transport, and they typically rely on noble metal additives or complex multilayer configurations. To tackle these issues, this study devised a self‐activated integrated carbon‐based air cathode. By integrating in situ catalytic site construction with structural optimization, the strategy not only induces the formation of oxygen functional groups (─C─OH, ─C═O, ─COOH), hierarchical pores, and uniformly distributed active sites, but also establishes a favorable electronic and mass‐transport environment. Furthermore, the roll‐pressing‐based integrated design streamlines electrode construction, reinforces interfacial bonding, and significantly enhances mechanical stability. Density functional theory (DFT) calculations show that oxygen functional groups initiate hydrogen bonding interaction and promote charge enrichment, which improves the activity of the cathode and facilitates intermediate adsorption/desorption in oxygen reduction and evolution reactions processes. As a result, the integrated air cathode‐based rechargeable zinc‐air batteries (RZABs) achieve a high specific capacity of 811 mAh g–1. It also performs well in quasi‐solid‐state RZABs and silicon‐air batteries systems across a wide temperature range, demonstrating strong adaptability and application potential. This study provides a scalable and cost‐effective design strategy for high‐performance carbon‐based air cathodes, offering new insights into advancing durable and practical metal–air energy systems. This study proposes a “self‐activation integration” strategy to construct catalyst‐free carbon‐based air cathodes with in situ oxygen functionalization and hierarchical porosity. This approach effectively enhances ORR/OER catalytic activity, promotes gas diffusion, and stabilizes the gas‐liquid‐solid three‐phase interface. The integrated electrode exhibits excellent electrochemical performance and long‐term stability in both primary and secondary air‐batteries, offering a scalable and cost‐effective pathway for practical metal–air battery applications.
Journal Article
Efficiency of 3D‐Ordered Macroporous La0.6Sr0.4Co0.2Fe0.8O3 as an Electrocatalyst for Aprotic Li‐O2 Batteries
2019
Li‐O2 batteries (LOBs) with an extremely high theoretical energy density have been reported to be the most promising candidates for future electric storage systems. Porous catalysts can be beneficial for LOBs. Herein, 3D‐ordered macroporous La0.6Sr0.4Co0.2Fe0.8O3 perovskite oxides (3D‐LSCF) are applied as cathode catalysts in LOBs. With a high Brunauer‐Emmett‐Teller surface area (21.8 m2 g−1) and unique honeycomb‐like macroporous structure, the 3D‐LSCF catalysts possess a much higher efficiency than La0.6Sr0.4Co0.2Fe0.8O3 (LSCF) nanoparticles. The unique 3D‐ordered macropores play a significant role in the product deposition as well as oxygen and electrolyte transmission, which are crucial for the discharge‐charge processes of LOBs. Power dimension: Three‐dimensionally ordered macroporous La0.6Sr0.4Co0.2Fe0.8O3 perovskite oxides (3D‐LSCF) are applied as cathode catalysts in Li‐O2 batteries (LOBs). With a high Brunauer‐Emmett‐Teller surface area (21.8 m2 g−1) and unique honeycomb‐like macroporous structure, the 3D‐LSCF catalysts possess a much higher efficiency than La0.6Sr0.4Co0.2Fe0.8O3 nanoparticles. The unique 3D‐ordered macropores play a significant role in the product deposition as well as oxygen and electrolyte transmission, which are crucial for the discharge‐charge processes of LOBs.
Journal Article
Efficiency of 3D‐Ordered Macroporous La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3 as an Electrocatalyst for Aprotic Li‐O 2 Batteries
Li‐O 2 batteries (LOBs) with an extremely high theoretical energy density have been reported to be the most promising candidates for future electric storage systems. Porous catalysts can be beneficial for LOBs. Herein, 3D‐ordered macroporous La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3 perovskite oxides (3D‐LSCF) are applied as cathode catalysts in LOBs. With a high Brunauer‐Emmett‐Teller surface area (21.8 m 2 g −1 ) and unique honeycomb‐like macroporous structure, the 3D‐LSCF catalysts possess a much higher efficiency than La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3 (LSCF) nanoparticles. The unique 3D‐ordered macropores play a significant role in the product deposition as well as oxygen and electrolyte transmission, which are crucial for the discharge‐charge processes of LOBs.
Journal Article
Pluripotent stem cells induced from mouse neural stem cells and small intestinal epithelial cells by small molecule compounds
by
Junqing Ye Jian Ge Xu Zhang Lin Cheng Zhengyuan Zhang Shan He Yuping Wang Hua Lin Weifeng Yang Junfang Liu Yang Zhao Hongkui Deng
in
631/532/2064
,
631/532/2182
,
631/532/2435
2016
Recently, we reported a chemical approach to generate pluripotent stem cells from mouse fibroblasts. However, whether chemically induced pluripotent stem cells (CiPSCs) can be derived from other cell types remains to be demonstrated. Here, using lineage tracing, we first verify the generation of CiPSCs from fibroblasts. Next, we demon- strate that neural stem cells (NSCs) from the ectoderm and small intestinal epithelial cells (IECs) from the endoderm can be chemically reprogrammed into pluripotent stem cells. CiPSCs derived from NSCs and IECs resemble mouse embryonic stem cells in proliferation rate, global gene expression profile, epigenetic status, self-renewal and differen- tiation capacity, and germline transmission competency. Interestingly, the pluripotency gene Sall4 is expressed at the initial stage in the chemical reprogramming process from different cell types, and the same core small molecules are required for the reprogramming, suggesting conservation in the molecular mechanism underlying chemical reprogramming from these diverse cell types. Our analysis also shows that the use of these small molecules should be finetuned to meet the requirement of reprogramming from different cell types. Together, these findings demonstrate that full chemical reprogramming approach can be applied in cells of different tissue origins and suggest that chemical reprogramming is a promising strategy with the potential to be extended to more initial types.
Journal Article
Health Communication on the Internet: Promoting Public Health and Exploring Disparities in the Generative AI Era
2025
Health communication and promotion on the internet have evolved over time, driven by the development of new technologies, including generative artificial intelligence (GenAI). These technological tools offer new opportunities for both the public and professionals. However, these advancements also pose risks of exacerbating health disparities. Limited research has focused on combining these health communication mediums, particularly those enabled by new technologies like GenAI, and their applications for health promotion and health disparities. Therefore, this viewpoint, adopting a conceptual approach, provides an updated overview of health communication mediums and their role in understanding health promotion and disparities in the GenAI era. Additionally, health promotion and health disparities associated with GenAI are briefly discussed through the lens of the Technology Acceptance Model 2, the uses and gratifications theory, and the knowledge gap hypothesis. This viewpoint discusses the limitations and barriers of previous internet-based communication mediums regarding real-time responses, personalized advice, and follow-up inquiries, highlighting the potential of new technology for public health promotion. It also discusses the health disparities caused by the limitations of GenAI, such as individuals’ inability to evaluate information, restricted access to services, and the lack of skill development. Overall, this study lays the groundwork for future research on how GenAI could be leveraged for public health promotion and how its challenges and barriers may exacerbate health inequities. It underscores the need for more empirical studies, as well as the importance of enhancing digital literacy and increasing access to technology for socially disadvantaged populations.
Journal Article
Potential geographical distribution of Garcinia paucinervis Chun et How in China under future climate change scenarios based on the MaxEnt Model
by
Song, Junfang
,
Cheng, Lei
,
Sun, Xieping
in
Agricultural production
,
Annual precipitation
,
Annual temperatures
2025
Garcinia paucinervis Chun et How is a tree species with important ecological, medicinal, and ornamental value. Studying the impact of climate change on the potential distribution of this species offers important information for resource conservation, population restoration, and sustainability. In this study, the MaxEnt model was used to simulate potential distributions under climate change conditions. Results showed that the precipitation of the driest quarter (Bio-17) ranging from 33.3 to 133.3 mm, the precipitation of the warmest quarter (Bio-18) from 667.67 to 1000 mm, the annual mean temperature (Bio-01) from 18.0 to 24.0 °C, and the annual precipitation (Bio-12) from 1250.0 to 1760.0 mm were four dominant factors affecting the distribution of G. paucinervis . Its suitable habitat in China is the narrowest, and it is located in most regions of Guangxi and Guangdong, the southern region of Guizhou, and the southeastern part of Yunnan Province. In the 2050s and 2070s, the geographical distribution gradually decreased compared to current scenarios. Specifically, most of Guangxi and Guangdong, the southern region of Guizhou, the eastern part of Yunnan adjacent to Guangxi, the southeast region of Sichuan, and the northern region of Hainan were identified as stable suitable habitats for G. paucinervis . Meanwhile, the expanding areas were located only in the western and southern regions of Yunnan, and the contracting areas were in the junction of Guangdong, Fujian, and Jiangxi; among Guizhou, Chongqing, and Hunan; among Anhui, Henan, and Hubei; the southeastern region of Sichuan; the western region of Hubei; and the adjacent area between Chongqing and Sichuan. By the 2070s, the contracting habitats will additionally include the central Guizhou region, the northern regions of Guangdong and Guangxi, the eastern region of Guangdong adjacent to Fujian, and the southern Jiangxi Provinces. Thus, this study highlights the vulnerability of the species and its response to future climate change and provides insights for assessing habitat suitability for conservation management.
Journal Article
Health Insurance Payment for Telehealth Services: Scoping Review and Narrative Synthesis
by
Cheng, Feng
,
Li, Qingqing
,
Xu, Junfang
in
Humans
,
Insurance, Health - economics
,
Insurance, Health, Reimbursement - economics
2024
As telehealth services have demonstrated significant advantages in providing qualified and accessible care, health insurance payments for telehealth services have been issued by various countries. However, the optimization of health insurance payments for telehealth services remains uncertain.
We conducted a scoping review of the current situation regarding health insurance payments for telehealth services, with the aim of providing evidence to enhance policies related to health insurance payments for such services.
This scoping review was conducted by comprehensively retrieving data from 6 electronic bibliographic databases from inception to October 2023. The databases included China National Knowledge Infrastructure, Wan Fang, Weipu, Web of Science, PubMed, and Embase, following the PRISMA-ScR (Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews) guidelines. Two authors independently assessed search results, extracted data, and evaluated the quality of the included studies using the Critical Appraisal Skills Programme checklist. After the initial screening of titles and abstracts, full texts were obtained and examined. The data regarding the first author, date of publication, country, type of telehealth services introduced in health insurance, health insurance reimbursement providers, reimbursement standards for telehealth (eg, the condition for the reimbursement and reimbursement rate), and key findings of studies were extracted and analyzed. Moreover, we also conducted a narrative synthesis to summarize and report the findings.
A total of 7232 papers were retrieved. Following quality assessment, 23 papers were finally included, with the covered countries including China, the United States, Australia, France, Japan, the United Kingdom, and Germany. The forms of the services vary across different regions, mainly including consultation services, medical monitoring services, mental health services, health education services, and other services. Payment standards are generally categorized into fee-for-service and global budget payment, with clear health insurance payment quotas or proportions and certain restrictions (eg, specifying the location of medical visits and setting the limitation on distance from home to hospitals). The paying entities for health insurance payment include national health insurance and commercial health insurance. In addition, there are 2 kinds of reimbursement rates-a comparable rate for both telehealth and in-person health care services, and a lower rate for telehealth services compared to in-person health care services.
To enhance the accessibility of telehealth services through health insurance payment, it is crucial to further refine the design of health insurance payment for telehealth and strengthen the supervision of services quality, bridging the gap between telehealth and in-person health care services. Additionally, this review did not include studies from all countries, and we recommend that future reviews should include a broader range of countries to provide a more comprehensive view of global telehealth insurance systems.
Journal Article