Metal–Organophosphine Framework‐Derived N,P‐Codoped Carbon‐Confined Cu3P Nanopaticles for Superb Na‐Ion Storage |
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Authors: | Minhong Kong Huaihe Song Jisheng Zhou |
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Affiliation: | Beijing Advanced Innovation Centre for Soft Matter Science and Engineering, State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing, P. R. China |
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Abstract: | Metal–organic framework derived approaches are emerging as a viable way to design carbon‐confined transitional metal phosphides (TMPs@C) for energy storage and conversion. However, their preparation generally involves a phosphorization using a large amount of additional P sources, which inevitably releases flammable, poisonous PH3. Therefore, developing an efficient strategy for eco‐friendly synthesis of TMPs@C is full of challenges. Here, a metal–organophosphine framework (MOPF) derived strategy is developed to allow an eco‐friendly design of TMPs@C without an additional P source, avoiding release of PH3. To illustrate this strategy, 1,3,5‐triaza‐7‐phosphaadamantane (PTA) ligands and Cu(NO3)2 metal centers are employed to construct Cu/PTA‐MOPFs nanosheets. Cu/PTA‐MOPFs can be directly converted to carbon‐confined Cu3P nanoparticles by annealing. Benefiting from high heteroatom content in PTA, a high doping content of 3.92 at% N and 8.26 at% P can also be achieved in the carbon matrix. As a proof‐of‐concept application, N,P‐codoped carbon‐confined Cu3P nanoparticles as anodes for Na‐ion storage exhibit a high initial reversible capacity of 332 mA h g?1 at 50 mA g?1, and superb rate and cyclic performance. Due to rich coordination modes of organophosphine, MOPFs are expected to become a promising molecular platform for design of various heteroatom‐doped TMPs@C for energy storage and conversion. |
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Keywords: | Cu3P metal– organophosphine frameworks Na‐ion storage N,P‐codoping carbon transitional metal phosphides |
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