Stretchable and Self-Healing Integrated All-Gel-State Supercapacitors Enabled by a Notch-Insensitive Supramolecular Hydrogel Electrolyte,ACS Applied Materials & Interfaces

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Stretchable and Self-Healing Integrated All-Gel-State Supercapacitors Enabled by a Notch-Insensitive Supramolecular Hydrogel Electrolyte
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-09-28 00:00:00 , DOI: 10.1021/acsami.8b13947
Yunhui Shi ₁ , Yan Zhang ₁ , Limin Jia ₁ , Qian Zhang ₁ , Xinhua Xu _{1,

2}

Affiliation

Next-generation wearable electronics are expected to endure significant deformations and mechanical damage. Therefore, self-healing stretchable electrolytes with high ionic conductivity and robust mechanical strength, which have high tolerance of deformations and spontaneously recover electrochemical properties after external damage, are necessary conditions for the realization of flexible supercapacitors. Here, a new type of zwitterionic supramolecular hydrogel cross-linked through rationally designed ionic associations and hydrogen bonds is reported (PAD/H₂SO₄). The resultant supramolecular network realizes a high ionic conductivity of 57 mS cm^–1 and unprecedented mechanical properties such as a high toughness of 35 000 J m^–2, a notch-insensitive of up to 2200% strain, and efficient instantaneous self-healing within 5 min. Acting as an electrolyte, a novel flexible supercapacitor design strategy is proposed by integrating capacitive materials directly onto the PAD/H₂SO₄ hydrogel to achieve exceptional electrochemical performance, which can be repeatable for at least 50 cutting/healing cycles. The facile and versatile strategy for the construction of the integrated all-gel-state supercapacitors with self-healing stretchable electrolytes will provide new directions for future long-life flexible devices.

中文翻译：

可通过陷波不敏感的超分子水凝胶电解质实现可拉伸且自愈的集成全凝胶态超级电容器

下一代可穿戴电子设备有望承受显着的变形和机械损坏。因此，具有高的离子电导率和鲁棒的机械强度的自修复可拉伸电解质，具有高的变形容忍度，并在外部损坏后自发恢复电化学性能，是实现柔性超级电容器的必要条件。在此，报道了通过合理设计的离子缔合和氢键交联的新型两性离子超分子水凝胶（PAD / H ₂ SO ₄）。最终的超分子网络实现了57 mS cm ^–1的高离子电导率和空前的机械性能，例如35 000 J m ^–2的高韧性，对缺口不敏感的应变高达2200％，并在5分钟内实现了有效的瞬时自我修复。作为电解质，提出了一种新颖的柔性超级电容器设计策略，该策略是将电容性材料直接集成到PAD / H ₂ SO ₄水凝胶上，以实现出色的电化学性能，该性能至少可重复50次切割/修复循环。具有自愈可拉伸电解质的集成全凝胶态超级电容器构建的灵活而灵活的策略将为未来的长寿命柔性设备提供新的方向。

更新日期：2018-09-28

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