| 1 | The Surface Coating of Commercial LiFePO_4 by Utilizing ZIF-8 for High Electrochemical Performance Lithium Ion Battery显示文摘The requirement of energy-storage equipment needs to develop the lithium ion battery(LIB) with high electrochemical performance. The surface modification of commercial LiFePO_4(LFP) by utilizing zeolitic imidazolate frameworks-8(ZIF-8) offers new possibilities for commercial LFP with high electrochemical performances.In this work, the carbonized ZIF-8(C_(ZIF-8)) was coated on the surface of LFP particles by the in situ growth and carbonization of ZIF-8. Transmission electron microscopy indicates that there is an approximate 10 nm coating layer with metal zinc and graphite-like carbon on the surface of LFP/C_(ZIF-8) sample. The N_2 adsorption and desorptionisotherm suggests that the coating layer has uniform and simple connecting mesopores. As cathode material, LFP/C_(ZIF-8) cathode-active material delivers a discharge specific capacity of 159.3 m Ah g^(-1) at 0.1 C and a discharge specific energy of 141.7 m Wh g^(-1) after 200 cycles at 5.0 C(the retention rate is approximate 99%). These results are attributed to the synergy improvement of the conductivity,the lithium ion diffusion coefficient, and the degree of freedom for volume change of LFP/C_(ZIF-8) cathode. This work will contribute to the improvement of the cathode materials of commercial LIB. | XiaoLong Xu CongYu Qi ZhenDong Hao Hao Wang JinTing Jiu JingBing Liu Hui Yan Katsuaki Suganuma | 2018 | Nano-Micro Letters2018，10，1： | 7 |
| 2 | Mn-MOF derived manganese sulfide as peroxymonosulfate activator for levofloxacin degradation: An electron-transfer dominated and radical/nonradical coupling process显示文摘Recently,transitionmetal sulfides have attractedmuch attention due to their better catalytic capacities as peroxymonosulfate(PMS)activator than their metal oxide counterparts.However,the systematic studies on PMS activation using transition metal sulfides are still lacking.In this work,manganese sulfide(MnS)materials were synthesized via a MOFs-derived method and utilized for PMS activation to degrade levofloxacin(LVF)in water for the first time.As expected,MnS exhibited remarkable LVF degradation efficiency by PMS activation,whichwas distinctly higher than Mn_(2)O_(3).The results of quenching experiments,electro spin resonance identification and electrochemical tests indicated that electron-transfer progress was the dominant mechanism inα-MnS/PMS system.Meanwhile,the presence of ^(1)O_(2) and radicals further became the removal of LVF byα-MnS/PMS system into a radical/nonradical coupling process.The superior electrical conductivity ofα-MnS thanα-Mn_(2)O_(3) was revealed by DFT calculations,which resulted in the higher catalytic capacity ofα-MnS.The result of XPS also indicated the S species in MnS accelerated the recycle of Mn(IV)/Mn(II)and then promoted the generation of radicals.Furthermore,the influence of various environmental conditions on LVF removal and the reusability ofα-MnS were also investigated,which demonstrated the high application potential ofα-MnS/PMS system.Finally,six possible pathways of LVF oxidation in the system were proposed based on the identified byproducts and their ecotoxicity was evaluated with ECOSAR method.This work promotes the fundamental understanding of PMS activation byα-MnS and provides useful information for practical application of manganese sulfide in water treatment. | Xiaolin Han Wei Zhang Shuai Li Congyu Cheng Qi Yu Qilong Jia Lei Zhou Guangli Xiu | 2023 | Journal of Environmental Sciences2023，，8： | 0 |
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