The Zn metal anodes of aqueous zinc ion batteries (ZIBs) suffer from dendrites and severe side reactions, such as the hydrogen evolution reaction (HER) and passivation, which seriously restrict the shelf life of ZIBs. Herein, these issues were addressed with a solid polymer electrolyte (SPE) based on the poly(vinylidene fluoride-co-hexafluoropropylene) filled by the poly(methyl acrylate) grafted MXenes (denoted as PVHF/MXene-g-PMA) for the first time. Homogeneously dispersed MXenes were achieved benefiting from the intriguing interaction between the highly grafted PMA and PVHF matrix. The resulting SPE exhibits three orders of magnitude larger ionic conductivity than the PVHF matrix, reaching 2.69 × 10⁻⁴ S cm⁻¹ at room temperature. Dendrite-free Zn plating/stripping with high reversibility was achieved (over 1000 h cycles at room temperature and 200 h at high temperature). Subsequently, the fabricated solid full cells with eliminated HER and suppressed anode dendrites exhibited excellent cycling performance of 10 000 cycles at 2C at room temperature and could work normally at temperatures ranging from −35 °C to 100 °C. Most importantly, over 90 days of shelf life was attained for the all-solid-state ZIBs after storage at low/high temperatures. Our work represents a substantial progress on the all-solid-state ZIBs with superior stability and reliability, reflected by the effectively suppressed dendrites and side reactions, excellent cycling performance and remarkable shelf life.

中文翻译：

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接枝的MXene /聚合物电解质，用于高性能固态锌电池，在低温/高温下具有更长的保质期

水性锌离子电池（ZIBs）的Zn金属阳极遭受树枝状结晶和严重的副反应（例如放氢反应（HER）和钝化）的影响，这严重限制了ZIBs的保存期限。在本文中，这些问题是通过基于聚（偏二氟乙烯-共-六氟丙烯）的固体聚合物电解质（SPE）解决的，该电解质由聚丙烯酸甲酯接枝的MXenes（表示为PVHF / MXene- g- PMA）填充而成。时间。得益于高度接枝的PMA和PVHF基质之间有趣的相互作用，可以实现均相分散的MXene。所得的SPE的离子电导率比PVHF基质高三个数量级，达到2.69×10 ^-4 S cm ^-1在室温下。实现了具有高可逆性的无枝晶锌镀/剥离（室温下经过1000 h循环，高温下经过200 h）。随后，制造的具有消除的HER和抑制的阳极树枝状晶体的固态满电池在室温2℃下表现出10 000次循环的优异循环性能，并且可以在-35°C至100°C的温度下正常工作。最重要的是，在低温/高温下储存后，全固态ZIB的保质期超过90天。我们的工作代表了具有卓越稳定性和可靠性的全固态ZIBs的实质性进步，这一点体现在有效抑制树突和副反应，出色的循环性能和卓越的保质期上。