Water-soluble Polypyrrole-Polybis(4-oxy benzene sulfonic acid)phosphazene Composites and Investigation of Their Performance as Cathode Binder in Li-ion Batteries.

Current electric storage systems eagerly focus on high-power and energy-dense Lithium-ion batteries to cope with increasing energy storage demands. Since cathode materials are one of the bottlenecks of these batteries, there is much interest in layered lithium-rich manganese oxide-based (LLMO) cathodes which can develop this technology. However, Initial Coulombic Efficiency (ICE) loss, poor rate performance and cycling instability issues are still persistent as problems to be solved for these materials. Recent research shows that water-soluble binders are effective in improving the performance of LLMO materials. Herein, we describe the synthesis, characterisation, and application of a series of water-soluble composites as a binder for LLMO cathodes. The PPy is introduced as part of the binder to improve the electronic conductivity and two different oxidants and various PPy to PSAP ratios were used to optimise the final properties. The electrochemical performance and morphology of the cathodes before and after cycling were investigated and compared with the conventional PVDF binder. The LLMO-2c electrode showed excellent charge-discharge performance, especially at 5 C and 10 C rates, and high cycling stability at 0.2 C whilst maintaining a final capacity of 184 mAh/g after 200 cycles, which is equal to 89.3 % capacity retention.

Positive Links Between Exposure to Police Violence, PTSD, and Depression Symptoms Among Yellow Vests Protesters in France.

Police violence during protests occurs worldwide with varying levels ranging from physical abuse to lethal use of force. Although prior research has investigated the health consequences of exposure to police violence (EPV), EPV's relationship with protesters' mental health has not yet been examined. Therefore, we designed a cross-sectional study which included measures of self-reported EPV, depression, and post-traumatic stress symptoms. The computerized survey was disseminated among a large sample of Yellow Vests protesters in France (N = 523; average protest attendance = 18). Overall, 49% of protesters displayed severe symptoms of depression and 15.5% met the criteria for provisory post-traumatic stress disorder (PTSD) diagnoses. Subsequent analyses revealed, as expected, positive associations between EPV, depression, and post-traumatic stress symptoms in our sample (.30 < d < .63). These were robust to adjustment on several potential confounds (e.g., physical injuries, demographics, political extremism) and similar when analyzing provisory diagnoses rates (1.65 < OR < 3.02). This study is the first to assess potentially detrimental effects of EPV on mental health during protests. Furthermore, prevalence rates for both provisory depression and PTSD diagnoses were comparable with those found among war-refugee populations. We call for further research on EPV among various protester samples and use longitudinal designs to investigate a potent risk factor for mental health issues among civilian populations.

Evidence for indirect loss of significance effects on violent extremism: The potential mediating role of anomia.

Psychological research suggests that violent extremism (e.g., terrorism) stems partly from existential motives, such as individuals' need to achieve significance in life after experiencing failure, ostracism, or humiliation (Significance Quest Theory; SQT). Parallel investigations from sociology and criminology established similar findings by linking anomia-a syndrome including feelings of meaninglessness, powerlessness, isolation, self-estrangement, and normlessness-with violent behavior. In line with SQT, this contribution tested if anomia could mediate Loss of Significance effects on violent extremism. Accordingly, three studies conducted in France highlight indirect effects of exposure to discrimination on legitimation of political violence (Study 1, cross-sectional, minority population sample, N = 110), violent behavioral intentions (Study 2, experimental, undergraduate sample, N = 249), and support for ISIS fighters (Study 3, experimental, undergraduate sample, N = 221) through anomia. A subsequent study shows this indirect effect to be robust when controlled for Social Dominance Orientation and Political Extremism (Study 4, cross-sectional, undergraduate sample, N = 279). A final investigation re-analyzing data collected in Turkey highlights a reverse effect when the independent variable tapped into social inclusion (rather than exclusion; Study 5, cross-sectional, undergraduate sample, N = 321). This indirect effect was also robust to Political Extremism and Intolerance as control variables. These results support the usefulness of considering anomia as a proximal predictor of violent extremism in a SQT perspective.

Social identity continuity and mental health among Syrian refugees in Turkey.

PURPOSE: Building upon social psychological work on social identity and mental health, this study among Syrian refugees in Turkey examined the importance of multiple group memberships and identity continuity for mental health and well-being. METHOD: A survey study was conducted among the very difficult to reach population of Syrian refugees (N = 361). With path analysis in AMOS the associations were examined between multiple group memberships, social identity continuity and mental health and psychological well-being. RESULTS: Indicate that belonging to multiple groups before migration was related to a higher likelihood of having preserved group memberships after migration (i.e., sense of social identity continuity), which, in turn, predicted greater life satisfaction and lower levels of depression. Multiple group membership, however, was also directly related to higher depression. CONCLUSIONS: Findings are discussed in relation to the importance of multiple group membership and feelings of identity continuity for refugees.