For exploring the multifold helical fabrication of polyoxometalate (POM)-based hybrid compounds, four POM-based crystalline compounds with different meso-helices, H₃[Ag₂₇(trz)₁₆(H₂O)₆][SiW₁₂O₄₀]₂·5H₂O (1), H[Ag₂₇(trz)₁₆(H₂O)₄][PW₁₂O₄₀]₂·2H₂O (2), [Ag₂₃(trz)₁₄(H₂O)₂][HSiW₁₂O₄₀] (3), and [Ag₂₃(trz)₁₄(H₂O)₂][PW₁₂O₄₀] (4), were successfully isolated by using the delicate 1,2,3-triazole ligand and silver ions in this work. Crystal analysis reveals that compounds 1 and 2 and compounds 3 and 4 are isomorphous and display 2-/4-fold mixed meso-helices and simple 2-fold meso-helices, respectively. In addition, due to the reversible multielectron redox behavior and electron storage functions of POMs, compounds 1 and 3 were studied as anode materials in lithium-ion batteries (LIBs). Compounds 1 and 3 show very high lithiation capacities (1356 and 1140 mAh g^–1, respectively) in the initial cycle, which are much higher than those of (NBu₄)₄[SiW₁₂O₄₀] and commercial graphite at the current density of 100 mA g^–1. More importantly, both compounds also show good stable performance after 100 cycles.

中文翻译：

---

多层螺旋多金属氧酸盐基金属有机骨架的组装，作为锂离子电池中的阳极材料

为了探索基于多金属氧酸盐（POM）的杂化化合物的多重螺旋结构，使用四种具有不同介螺旋，H ₃ [Ag ₂₇（trz）₁₆（H ₂ O）₆ ] [SiW ₁₂ O ₄₀ ]的基于POM的晶体化合物₂ ·5H ₂ O（1），H [Ag ₂₇（trz）₁₆（H ₂ O）₄ ] [PW ₁₂ O ₄₀ ] ₂ ·2H ₂ O（2），[Ag ₂₃（trz）₁₄（H ₂ O） ）[ ₂ ] [HSiW ₁₂ O ₄₀ ]（3）和[Ag ₂₃（trz）₁₄（H ₂ O）₂ ] [PW ₁₂ O ₄₀ ]（4）通过使用精细的1,2,3-成功分离。三唑配体和银离子在这项工作中。晶体分析表明，化合物1和2和化合物3和4是同构的，分别显示2- / 4倍混合的介观螺旋和简单的2倍介观螺旋。此外，由于POM的可逆多电子氧化还原行为和电子存储功能，化合物1研究了3和3作为锂离子电池（LIB）的负极材料。化合物1和3在初始循环中显示出非常高的锂化能力（分别为1356和1140 mAh g ^–1），在电流密度下，它们远高于（NBu ₄）₄ [SiW ₁₂ O ₄₀ ]和商用石墨的锂化能力。100 mA g ^–1。更重要的是，两种化合物在100次循环后也显示出良好的稳定性能。