Electrochemical properties of pre-lithiated nanorod-like LixV6O13 lithium ion battery cathode materials prepared by solvothermal method
Publication date: Available online 9 November 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Shengyu Li, Zhengguang Zou, You Li, Yanjiao Zhang, Huanhuan ZhangAbstractVanadium oxides have been proved to be prospective nanoscale electrode materials which are being extensively explored in electrochemical. However, low cycle stability and multiplier performance have limited the commercial application of materials. To overcome this disadvantage, a rod-like LixV6O13 was synthesized by solvothermal method using LiNO3, V2O5, C2H5OH (Ethanol absolute) as raw materials. The diameter of rod-shaped LixV6O13 was between 200 and 500 nm and presented excellent dispersibility. The results indicated that proper pre-lithiation improved the specific capacity and rate performance of V6O13. When x = 0.055 (VO-Li2), the rod-like LixV6O13 exhibited a capacity retention of 69.1% after 100 cycles at 0.1 C (42 mA/g) and a discharge capacity of 98.5 mAh/g after 100 cycles at 1 C, comparing to those of the pure V6O13 of only 39.5% and 39.7 mAh/g respectively. The results of SEM and CV tests demonstrated that the improved electrochemical properties were mainly attributed to the increase of material specific surface area and the change of internal structure caused by lithium insertion, which promoted the kinetics of the chemical reaction and the electrochemical performance of LixV6O13. The applicability of the method was further examined through the disassembly of the battery aft...
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Publication date: Available online 6 December 2019Source: Journal of American Association for Pediatric Ophthalmology and StrabismusAuthor(s): Weiyi Xia, Wen Wen, Xiying Wang, Chao Jiang, Lianqun Wu, Ling Ling, Jing Yao, Chen Zhao
Publication date: Available online 6 December 2019Source: Journal of American Association for Pediatric Ophthalmology and StrabismusAuthor(s): Peter Daniel, Martin Cogen
Publication date: Available online 7 December 2019Source: Case Reports in Women's HealthAuthor(s): Gordon Narayansingh, Jennifer HohAbstractAbdominal pain following in vitro fertilization (IVF) in the presence of enlarged ovaries commonly leads to the diagnosis of ovarian hyperstimulation syndrome (OHSS). Progressively worsening pain with a rise in inflammatory markers with normal hematological indices implies a diagnosis of ovarian torsion of the hyperstimulated ovary. Early recourse to laparoscopic assessment and derotation of the affected ovary even after 72 h following the onset of symptoms can allow a return to viab...
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ABSTRACT: Intimate partner violence (IPV) occurs across all cultures, ethnicities, socioeconomic classes, and educational backgrounds. Nurses should be aware of IPV and causative factors that include personal attributes, stressors, and community issues. The Intimate Partner Exposome conceptual model is used to identify exogenous and endogenous IPV risk factors. In addition, distinctive environmental factors can increase risk for IPV. The purpose of this article is to increase recognition of causative factors and presenting signs to enhance the nurse's ability to identify and assist IPV victims.
This article discusses the experience of maternal loss and notes care needs of the motherless child-adult woman. Identification of women in this situation should be made as early as possible.
ABSTRACT: High mortality rates continue among African Americans related to complications of uncontrolled hypertension. The purpose of this study was to determine if a faith-based self-management education program would improve self-care activities related to the management of hypertension among African American adults. Ten African American adults who reported a diagnosis of hypertension for 6 months or longer completed an 8-week education program focused on strategies for hypertension management. The education program was enhanced with the utilization of spiritual components of prayer, Scripture reading, and journaling.
ABSTRACT: There has been an increase in student enrollment in advanced practice nurse programs, but limited information regarding attrition and dropout rates in nurse practitioner (NP) programs. Management of NP students includes student evaluations, preceptor guidance and support, student support, and use of reflective practice. Program directors, faculty members, and preceptors must assist NP students with role transitioning and help those who are not meeting the rigors of NP education to leave the program and discover alternative nursing roles.