The development of ultrastable carbon materials for potassium storage poses key limitations caused by the huge volume variation and sluggish kinetics.N itrogen-enriched porous carbons have recently emerged as promising candidates for this application;h owever,r ational control over nitrogen doping is needed to further suppress the long-term capacity fading. Here we propose astrategy based on pyrolysis-etching of apyridine-coordinated polymer for deliberate manipulation of edge-nitrogen doping and specific spatial distribution in amorphous high-surface-area carbons;t he obtained material shows an edge-nitrogen content of up to 9.34 at %, richer N distribution inside the material, and high surface area of 616 m 2 g À1 under ac ost-effective low-temperature carbonization. The optimizedc arbon delivers unprecedented K-storage stability over 6000 cycles with negligible capacity decay (252 mA hg À1 after 4months at 1Ag À1), rarely reported for potassium storage.

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Customers are increasingly talking positively about brands that are socially responsible and authentic. However, little empirical research has related corporate social responsibility (CSR) to brand authenticity and brand authenticity to customers’ positive word-of-mouth. Moreover, although highly attractive alternative brands are increasingly appearing in the marketplace, there is a lack of research examining the role of alternative attractiveness in the relationship between CSR and brand authenticity. We address these shortcomings in the literature drawing on data from 1,101 customers of insurance services brands and analyze them using structural equation modeling. The findings show that CSR is positively related to customers’ positive word-of-mouth, both directly and indirectly, through brand authenticity. Moreover, alternative attractiveness positively moderates the effect of CSR on brand authenticity. This implies that CSR can act as a differentiation mechanism to further enhance the focal brand’s authenticity, when an alternative brand is perceived as highly attractive.

Constructing robust nucleation sites with an ultrafine size in a confined environment is essential toward simultaneously achieving superior utilization, high capacity, and long-term durability in Na metal-based energy storage, yet remains largely unexplored. Here, we report a previously unexplored design of spatially confined atomic Sn in hollow carbon spheres for homogeneous nucleation and dendrite-free growth. The designed architecture maximizes Sn utilization, prevents agglomeration, mitigates volume variation, and allows complete alloying-dealloying with high-affinity Sn as persistent nucleation sites, contrary to conventional spatially exposed large-size ones without dealloying. Thus, conformal deposition is achieved, rendering an exceptional capacity of 16 mAh cm −2 in half-cells and long cycling over 7000 hours in symmetric cells. Moreover, the well-known paradox is surmounted, delivering record-high Na utilization (e.g., 85%) and large capacity (e.g., 8 mAh cm −2 ) while maintaining extraordinary durability over 5000 hours, representing an important breakthrough for stabilizing Na anode.

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