What young people say about physical activity: the children’s sport participation and physical activity study (CSPPA)

The Children's Sport Participation and Physical Activity (CSPPA) study is a unique multi-centre/discipline study undertaken by three Irish institutions, Dublin City University, University of Limerick and University College Cork. The study sought to assess participation in physical activity, physical education and sport (PAPES) among 10–18 year olds in Ireland. This paper shares what Irish children and young people convey, using their own voices, about their sport and physical activity (PA) experiences and how such experiences may result in their feeling included or excluded in PAPES. Eighteen focus groups (FG) with 124 boys and girls elicited descriptive data from students and were conducted with homogeneous groups of 6–8 boys and girls aged 12–18 years (selected for convenience) identified as male/female, primary/post-primary and generally active/inactive. Five themes (‘being with friends’, ‘variety in activity content’, ‘experiencing fun’, ‘time constraints’ and ‘opportunity to be outside’) ran across the three PAPES opportunities for young people. Overall data revealed that these young people have a positive attitude towards PA which does not diminish as they age despite activity levels decreasing. Other choices of activity participation (e.g. debate, music), or more focused activities took the place of previous choices as young people came to realise what they most enjoyed. If we are to encourage and provide opportunities for young people to choose active lifestyles, it is important that we address what these young people report affects their involvement in PA across a number of contexts. Two such developments within Irish school and community contexts are discussed: Active School Flag initiative and Senior Cycle Physical Education framewor

Accelerated Evolution of Surface Chemistry Determined by Temperature and Cycling History in Nickel-Rich Layered Cathode Materials

Nickel-rich layered cathode materials have the potential to enable cheaper and higher energy lithium ion batteries. However, these materials face major challenges (e.g., surface reconstruction, microcracking, potential oxygen evolution) that can hinder the safety and cycle life of lithium ion batteries. Many studies of nickel-rich materials have focused on ways to improve performance. Understanding the effects of temperature and cycling on the chemical and structural transformations is essential to assess the performance and suitability of these materials for practical battery applications. The present study is focused on the spectroscopic analysis of surface changes within a strong performing LiNi_0.8Mn_0.1Co_0.1O₂ (NMC811) cathode material. We found that surface chemical and structural transformations (e.g., gradient metal reduction, oxygen loss, reconstruction, dissolution) occurred quicker and deeper than expected at higher temperatures. Even at lower temperatures, the degradation occurred rapidly and eventually matched the degradation at high temperatures. Despite these transformations, our performance results showed that a better performing nickel-rich NMC is possible. Establishing relationships between the atomic, structural, chemical, and physical properties of cathode materials and their behavior during cycling, as we have done here for NMC811, opens the possibility of developing lithium ion batteries with higher performance and longer life. Finally, our study also suggests that a separate, systematic, and elaborate study of surface chemistry is necessary for each NMC composition and electrolyte environment