electrochemistry

Weak σ–π–σ Interaction Stabilizes Oxygen Redox in Li-Rich Cathodes

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Weak σ–π–σ Interaction Stabilizes Oxygen Redox in Li-Rich Cathodes

[Research Background] The key to controlling the oxygen oxidation-reduction chemistry is to adjust the chemical environment of the lattice oxygen with redox activity, namely the Li2MnO3-like domains.Recent studies have shown that aggregated large-sizeLi2MnO3-like domains can lead to irreversible TM migration and oxygen oxidation-reduction, resulting in notorious capacity fading and voltage decay. According to Pauling’s rules, … Read more

Enhancing Lithium-Ion Battery Charging Performance at Low Temperatures

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Enhancing Lithium-Ion Battery Charging Performance at Low Temperatures

Background Introduction Lithium-ion batteries (LIBs) have garnered significant attention regarding their performance at low temperatures, as their cycling performance declines sharply with decreasing temperature. Despite significant improvements in battery discharge capabilities in recent years, reversible charging of batteries at temperatures as low as -20°C or even lower remains challenging. The primary reason is the severe … Read more