排序方式: 共有6条查询结果,搜索用时 15 毫秒
1
1.
Yutong Li Shitong Wang Yanhao Dong Yong Yang Zhongtai Zhang Zilong Tang 《Liver Transplantation》2020,10(4)
Nanostructured electrode materials are good candidates in batteries especially for high‐rate applications, yet they often suffer from extensive side reactions due to anomalously large surface areas. While micrometer‐size materials provide better stability, the lattice diffusivity is often too slow for lithium ion intercalation over the same length scale in a short time. Herein, a simple method to synthesize glass‐ceramic‐like vanadate cathodes for lithium‐ion batteries with abundant internal boundaries that allow fast lithium ion diffusion while maintaining a small surface area that thus minimize the contact and side reactions with organic electrolyte, is reported. Such samples heat‐treated under optimized conditions can deliver an impressive high‐rate capacity of 103 mAh g?1 at 4000 mA g?1 over 500 cycles, which has better kinetics and cycling stability than similar vanadate‐based materials. A striking grain‐size refinement effect accompanied by a low‐temperature growth‐controlled phase transition, can be achieved by fine tuning the heat‐treatment process. It is believed that the findings are general for other transition metal oxides for energy applications. 相似文献
2.
3.
4.
Yushan Zhang Mengting Chen Jingyi Guo Ning Liu Weiyi Yi Zhongtai Yuan Lifan Zeng 《Engineering in Life Science》2022,22(5):376
There are few reports on the material transformation and dominant microorganisms in the process of greening waste (GW) composting. In this study, the target microbial community succession and material transformation were studied in GW composting by using MiSeq sequencing and PICRUSt tools. The results showed that the composting process could be divided into four phases. Each phase of the composting appeared in turn and was unable to jump. In the calefactive phase, microorganisms decompose small molecular organics such as FA to accelerate the arrival of the thermophilic phase. In the thermophilic phase, thermophilic microorganisms decompose HA and lignocellulose to produce FA. While in the cooling phase, microorganisms degrade HA and FA for growth and reproduction. In the maturation phase, microorganisms synthesize humus using FA, amino acid and lignin nuclei as precursors. In the four phases of the composting, different representative genera of bacteria and fungi were detected. Streptomyces, Myceliophthora and Aspergillus, maintained high abundance in all phases of the compost. Correlation analysis indicated that bacteria, actinomycetes and fungi had synergistic effect on the degradation of lignocellulose. Therefore, it can accelerate the compost process by maintaining the thermophilic phase and adding a certain amount of FA in the maturation phase. 相似文献
5.
Report on the distribution,population, and ecology of the yunnan snub-nosed monkey (Rhinopithecus bieti) 总被引:2,自引:0,他引:2
Yongcheng Long Craig R. Kirkpatrick Zhongtai Xiaolin 《Primates; journal of primatology》1994,35(2):241-250
The Yunnan snub-nosed monkey (Rhinopithecus bieti), an endangered species in China, has received more protection in theory than in practice. Therefore it is on the very verge
of extinction. The population of the species was estimated less than 2,000 individuals spread in 19 distinct groups. It was
confirmed that the monkey was confined to the Yunling Mountain System, the area between the Yangtze River (Changjiang, aka
Jinshajiang) to the east and the Mekong River (Lancangjiang) to the west. We further concluded that a lowland belt to the
east, about 100 km long and 20 – 30 km wide was not suitable habitat for the monkeys, and appeared to serve as the natural
ecogeologic barrier for the species. Our results indicated that the southern limit of the distribution was at Longma (26°14′N),
and that the northern limit of the distribution was at Xiaochangdu (29°20′N). The distribution area of the species was substantially
smaller than previously estimated. There were substantial ecological differences between the southern and northern parts of
the species range. The monkey was found only in fir-larch forest. 相似文献
6.
1