Pyrrole was polymerized onto commercial SFG10 graphite by in situ polymerization technique. Polymerization decreases the initial irreversible capacity loss of the graphite anode. The decrease in the irreversible capacity loss is due to the reduction in the thickness of the solid electrolyte interface (SEI) layer formed. PPy/C (7.8%) gives the optimum performance based on the irreversible capaci...

With sufficient electricity storage capacity, any power production profile may be mapped onto any desired supply profile. We present a framework to determine the required storage power as a function of time for any power production profile, supply profile, and targeted system efficiency, given the loss characteristics of the storage system. We apply the framework to the electrochemical storage ...

Improving the specific capacity and electronic conductivity of TiO2 can boost its practical application as a promising anode material for lithium ion batteries. In this work, a three-dimensional networking oxygen-deficient nano TiO2-x/carbon fibre membrane was achieved by combining the electrospinning process with a hot-press sintering method and directly used as a self-standing anode. With the...

BACKGROUND A more profound investigation of respiratory muscle strength during COPD exacerbation was needed, so we investigated respiratory muscle strength and related factors in patients with COPD during and after hospitalization for COPD exacerbation. METHODS In 19 subjects hospitalized for COPD exacerbation (12 males, mean age 67 ± 11 y, median percent-of-predicted FEV(1) 26% [IQR 19-32%])...

OBJECTIVE To determine whether pulmonary function at discharge from inpatient rehabilitation can predict respiratory infection in spinal cord injury in the first year after discharge, and to determine which pulmonary function parameter predicts best. DESIGN Multicentre prospective cohort study. SUBJECTS A total of 140 persons with spinal cord injury. METHODS Pulmonary function was tested ...

OBJECTIVE To determine changes in functional independence following spinal cord injury and to evaluate the association between functional independence and physical capacity. DESIGN Multi-centre prospective cohort study. SUBJECTS Patients with spinal cord injury admitted for initial rehabilitation. METHODS The motor Functional Independence Measure (FIMmotor) was determined at the start of ...

throughout history dams have been important structures in water storage. to avoid overtopping, damage, and or failure of a dam, adequate spillway is needed to release excess water from upstream floods. researchers found that spillways have to be made nonlinear in order to reach an economic structure with high performance. a piano key weir is one of the best solutions. piano key weirs are the mo...

A thin film of sodium manganese ferrocyanide, Na1.32Mn[Fe(CN)6]0.83·3.5H2O, exhibits discharge capacity (= 109 mA h g(-1)) and discharge voltage (3.4 V in average) at 0.5 C against Na in aprotic solvent. The ex situ XRD experiments reveal that the host framework remains cubic without showing any structural phase transition during the charge process. The discharge property is discernible up to 4...

An iron-based mixed-polyanion compound, Li9Fe3(P2O7)3(PO4)2, is introduced as a possible cathode material for Li-ion batteries. Phase-pure Li9Fe3(P2O7)3(PO4)2 is successfully prepared by a sol-gel method, and its physicochemical properties are investigated in detail. Special attention is paid on making clear the variation of the phase composition with the annealing temperature and the effect of...