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One-pot preparation of LiFePO4/C composites
Juan Wang,Ji-Yu Li,Zhong-Bao Shao,Hong-Tao Fan,Hong-Qiang Ru,Shu-Yan Zang 한국화학공학회 2019 Korean Journal of Chemical Engineering Vol.36 No.2
A convenient one-pot method, called high-temperature high-energy mechanical force (HTHEMF), was successfully developed for the preparation of LiFePO4/C composites. Upon the combination of high-temperature with high-energy mechanical force, the whole synthesis process of this method is very simple and only involves two steps, the precursor preparation and the calcination step. The results of XRD, SEM, BET and electrochemical performance tests indicated that after calcination at 600 oC for 9 h, the LiFePO4/C composites have the best properties. The discharge capacity of the composites was 150.3mA h g−1 at 0.1 C. After 30 cycles test, the reversible capacity was 147mA h g−1 and the retention ratio to the initial capacity was 97.8%. The results indicated that LiFePO4/C composites with good properties can be obtained by one-pot HTHEMF method.
IMPACTS OF SHELLFISH CULTURE ON THE ECOSYSTEM IN SEMI-ENCLOSED BAYS
Ming Yuan Zhu,Ru Bao Ji,Shang Chen,Xue Lei Zhang 한국해안해양공학회 1999 학술강연회 발표논문초록집 Vol.1 No.1
Stimulated by high economic profits, the industries of shellfish culture have grown rapidly during the last two decades. The expansion of mariculture adds pressure on the environment and associated ecosystem. The potential impacts of the cultivation include reduction of primary productivity due to the consumption of large quantities of phytoplankton, changes of water current movement resulted from the semi-permeation 'Island' effects of the suspended culture, and production of a large amount of faeces and pseudofaeces which may enhance the importance of benthic ecosystem in geo-biological cycling.