ArticleSmall (Weinheim an der Bergstrasse, Germany)2026
Achieving High Capacity in Nickel-Rich Cathodes via Low-Voltage Lithium Storage Expansion.
Article in Small (Weinheim an der Bergstrasse, Germany), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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8 authors.
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Abstract
Lithium-excess configurations accessed at low cutoff voltages in nickel-rich layered oxides offer a promising route to increasing cathode capacity but are typically accompanied by rapid performance degradation and poor cycling stability. To address this challenge, we propose a constant-capacity (CCap) protocol that fixes the discharge capacity at a prescribed value. By selectively accessing the low-voltage lithium-storage reservoir while limiting the extent of lithiation below the stoichiometric threshold, this strategy suppresses uncontrolled deep lithiation and mitigates structural degradation. Li||NCM811 half-cells achieve extended cycling stability, delivering up to 300, 500, and 600 cycles at 100%, 90%, and 80% capacity retention, respectively. X-ray diffraction analysis reveals that capacity extension during cycling originates from the low-voltage regime through the formation of a Li
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