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将简单词换成高级词并润色:The structure of (NH4)2V6O16 crystals consists of VO5 square cone units and twisted VO6 octahedra, forming a twisted zigzag layer structure parallel to the (00l) plane [129]. (NH4)2V3O8 has a laminar and tunneling structure consisting...

The arrangement of (NH4)2V6O16 crystals is composed of VO5 square cone units and twisted VO6 octahedra, which collectively form a convoluted zigzag layer structure that aligns with the (00l) plane [129]. Meanwhile, (NH4)2V3O8 exhibits a layered and tunneled architecture consisting of VO5 square pyramids with shared vertices and VO4 tetrahedra. Such structures that possess laminar or tunneling features are capable of furnishing two-dimensional interstitial spaces for NH4+ intercalation, mitigating mechanical stresses arising from volumetric changes, as well as shortening diffusion distances [130, 131]. From an atomic configuration perspective, all singly-bonded oxygen atoms present in the NH4V4O10 and (NH4)2V3O8 layers can strongly interact with NH4+, whereby the stable and firmly anchored NH4+ ions function as robust “pillars” that consolidate the framework. Conversely, (NH4)2V6O16 comprises both single- and triple-bonded oxygen atoms on its surface layer. The triple-bonded oxygen atoms are unable to foster strong interactions with NH4+, leading to structural instability [132].

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