Eco-friendly and thermally stable cellulose film prepared by phase inversion as supercapacitor separator
MATERIALS CHEMISTRY AND PHYSICS
Authors: Xu, Daman; Teng, Genhui; Heng, Yingqi; Chen, Zhizhong; Hu, Dongying
Abstract
The transparent and renewable porous cellulose separators (ACR-3, ACR-5, ACR-7, ACR-9) with different concentration of cellulose solution (3 wt%, 5 wt%, 7 wt%, 9 wt%) were prepared via a phase-inversion process with 1-allyl-3-methylimidazolium chloride (AMIM-Cl) as the solvent. Cellulose separators displayed high thermal stability, strong mechanical properties and excellent apparent properties. ACR-7 separator showed a higher porosity of 74.90% and electrolyte uptake of 323.68% with a smaller pore size and a more uniform pore structure compared with the other cellulose separators. The assembled supercapacitors (electrode/separator/electrode, SCD-7) showed good electrochemical performances in many aspects, including a lower equivalent series resistance of 0.5 Omega, a higher charge-discharge efficiency of 98.58% at 3 A/g and areal capacitance of 1.15 F cm(-2) at 5 mV/s than the SCD-3, SCD-5, SCD-9 and the assembled SCDs with two commercial separators (TF4040 for SCD-40 and MPF30AC for SCD-30). SCD-7 showed a high retention of 81.99% after 4000 charge-discharge tests at 1 A/g, showing a good charge-discharge cycle stability. Compared with SCD-40 and SCD-30, SCD-7 showed a lower voltage drop below 0.03 V, a higher specific capacitance of 130 F/g, energy density of 25.94 Wh/kg and power density of 0.36 kW/kg at 0.5 A/g. Overall, ACR-7 is expected to be applied as a separator in the field of supercapacitors.
Facilitating patient-centred care for special care dentistry patients: A Quality Improvement Project in the Community Dental Service
BDJ OPEN
Authors: Nic Iomhair, Aoife; John, Miriam
Abstract
AimA Quality Improvement Project in one of the Special Care Dentistry (SCD) specialist centres in the School of Dentistry in Belfast aimed to improve the identification of the specific dental care needs of SCD patients from information available in the clinical record.MethodsThe Model for Improvement was used to define project objectives and subsequently implement changes to practice aimed at achieving those objectives through Plan-Do-Study-Act (PDSA) cycles. Continuous data collection to monitor performance was undertaken throughout.DesignA Patient Needs Assessment Tool to be used during new SCD patient assessments was designed and introduced, with subsequent changes to the defined process for use following analysis of the success of the initial intervention.ResultsThe amount of information on relevant dental care needs identifiable from clinical records following new SCD patient assessments increased from 30 to 90%, whereas the time taken to identify the relevant information decreased from 2min and 31s to 17s.ConclusionThe use of a Patient Needs Assessment pro-forma can achieve significant improvements in the extent and accessibility of information available to assist in the planning and delivery of appropriate and equitable care for SCD patients.