Pillared MXene with Ultralarge Interlayer Spacing as a Stable Matrix for High Performance Sodium Metal Anodes

By Jianmin Luo, Chuanlong Wang, Huan Wang, Xiaofei Hu, Edward Matios, Xuan Lu, Wenkui Zhang, Xinyong Tao, Weiyang Li. Advanced Functional Materials, 2018

295 citations recorded by the source corpus.

Sodium (Na) metal is a promising alternative to lithium metal as an anode material for the next‐generation energy storage systems due to its high theoretical capacity, low cost, and natural abundance. However, dendritic/mossy Na growth caused by uncontrollable plating/stripping results in serious safe concerns and rapid electrode degradation. This study presents Sn2+ pillared Ti3C2 MXene serving as a stable matrix for high‐performance dendrite‐free Na metal anode. The intercalated Sn2+ between Ti3C2 layers not only induces Na to nucleate and grow within Ti3C2 interlayers, but also endows the Ti3C2 with larger interlayer space to accommodate the deposited Na by taking advantage of the “pillar effect,” contributing to uniform Na deposition. As a result, the pillar‐structured MXene‐based Na metal electrode could enable high current density (up to 10 mA cm−2) along with high areal capacity (up to 5 mAh cm−2) over long‐term cycling (up to 500 cycles). The full cell using MXene‐based Na metal anode exhibits superior electrochemical performance than that using host‐less commercial Na. It is believed that the well‐controlled MXene‐based Na anode not only extends the application scope of MXene, but also provides guidance in designing high‐performance Na metal batteries.

Subfields: Electrical and Electronic Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/e6812ca96c40776c7642afcc0277f5472c07577f

How researchers see this paper

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In Electrical and Electronic Engineering

1. Edward Matios
2. Huan Wang
3. Weiyang Li
4. Jianmin Luo
5. Xinyong Tao

In Materials Chemistry

1. Edward Matios
2. Huan Wang
3. Weiyang Li
4. Jianmin Luo
5. Xinyong Tao

Citations in the corpus

• Interfacial structure design of MXene‐based nanomaterials for electrochemical energy storage and conversion (2020, background): “Apart from the application of pillared MXene for lithium-ion storage, our group also designed Sn pillared MXene (CT-Sn[II] @Ti3C2) that serves as a stable matrix for Na metal anode (Figure 4G).(66) In this work, intercalated Sn not only induces Na to nucleate and grow between Ti3C2 MXene layers, but”