Via an ion exchange induced phase transformation, A₂V₆O₁₆ ⋅ nH₂O (AVO, A=NH₄⁺, Na, K) was transformed to hewettite BV₆O₁₆ ⋅ 9H₂O (B=Zn, Mg, Ca, Cu), accompanied by reconstruction of the layers and expansion of interlayer spacing. Benefiting from the remarkably stable layers and ultralarge interlayer spacing, the ZnV₆O₁₆ ⋅ 8H₂O cathode exhibits an ultralong life and ultrahigh rate capability in aqueous Zn-ion batteries, substantially better than AVO.

中文翻译：

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Hewettite ZnV6O16 ⋅ 8H2O 具有非常稳定的层和超大层间距用于高性能水系锌离子电池

通过离子交换诱导的相变，A ₂ V ₆ O ₁₆  ⋅ nH ₂ O (AVO, A=NH ₄ ⁺ , Na, K) 被转化为硅钙石 BV ₆ O ₁₆  ⋅ 9H ₂ O (B=Zn, Mg, Ca, Cu)，伴随着层的重构和层间距的扩大。得益于非常稳定的层和超大的层间距，ZnV ₆ O ₁₆  ⋅ 8H ₂ O 正极在水系锌离子电池中表现出超长寿命和超高倍率性能，远优于 AVO。