Self‐Adaptive Interface Reconstruction over Black Phosphorus Complex for Wide‐Temperature and Fast‐Charging Potassium Ion Storage

Oct 18, 2025Angewandte Chemie (International ed. in English)

Self-Adjusting Surface Layer on Black Phosphorus for Fast and Wide-Temperature Potassium Ion Storage

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Abstract

Black phosphorus nanospheres encapsulated in a carbon matrix demonstrate stable performance across a wide temperature range of -70 °C to 80 °C.

Self-adaptive interface reconstruction may improve the kinetics and stability of black phosphorus for potassium storage.
The integration of organic and inorganic materials in the carbon matrix enhances fast charging capabilities.
The developed structure could achieve an extended cycle life of up to 1300 cycles.
High current density and temperature resilience are associated with the unique properties of the composite material.

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Black phosphorus (BP), exhibiting a large spatial layer and high theoretical capacity, has been heralded as a promising candidate for Kstorage. Nevertheless, the unpredictability of the structural/interfacial reconstruction guides the arduous kinetics and poor stability, especially conferring to high current density and wide-temperature operation. To address these challenges, self-adaptive interface reconstruction with a multiple secondary bonds mediation (IRSM) strategy is adopted for amphipathic BP complex to improve kinetics and stability, wherein BP nanospheres encapsulated into a sacciform B-doped carbon matrix (BC) are further grafted with polybromoisobutyryloxy benzenesulfonic (PBBS), which undergoes in situ polymerization and is transformed into metal-organic bromoisobutyrylox supramolecular (PBS). Consequently, combining the flexibility/rigidity advantage of organic moiety and the stability advantage of inorganic moiety, BC@BP@PBS manifests excellent fast charging behaviors, a wide-temperature operation from -70 °C to 80 °C, and an extended cycle life of up to 1300 cycles. This work builds an ingenious protocol for leveraging the trade-off between fast charging, wide-temperature operation, and long life span for high-performance cell devices. +

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Self‐Adaptive Interface Reconstruction over Black Phosphorus Complex for Wide‐Temperature and Fast‐Charging Potassium Ion Storage

Abstract

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