https://nova.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:14337 2 structure and high surface area for the sample heat treated at 250°C, and extensive structural conversion and micro-pore closure in the case of the 350°C material, lead to higher capacity and power output. Conversely, significant amounts of structural water in the 200°C sample, and the compromise in structural rearrangement and surface area loss for the material prepared at 300°C, result in poor electrochemical behaviour, especially at high discharge rates. Particularly evident from this study is the complex interplay between the heat treatment regime, resulting HEMD properties and electrochemical performance.]]> Wed 11 Apr 2018 16:39:14 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:15443 2 batteries. Kinetic analysis is used to determine the precise heating regime necessary to, theoretically, completely remove structural water from six different EMD samples. It was found that the oxidation of Mn(III) to Mn(IV) occurred to a greater extent for samples with initially high pyrolusite content and a low fraction of cation vacancies after heat treatment at low temperatures. This same Mn(III) to Mn(IV) conversion was also enhanced after high temperature treatment for those samples with a higher manganese content and low cation vacancy fraction. Additionally, at low heat treatment temperatures the parent γ-MnO₂ structure and cation vacancies were better retained in samples with low starting BET surface area. Finally, this work determined that samples with high BET surface area tend to lose proportionally less of this value as a consequence of heat treatment, compared to those with low initial values.]]> Wed 11 Apr 2018 16:20:21 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:15770 Wed 11 Apr 2018 16:07:16 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:10653 Wed 11 Apr 2018 15:34:12 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:48889 Mon 29 Jan 2024 18:53:21 AEDT ]]>