Stringed “tube on cube” nanohybrids as compact cathode matrix for high-loading and lean-electrolyte lithium–sulfur batteries†,Energy & Environmental Science

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Stringed “tube on cube” nanohybrids as compact cathode matrix for high-loading and lean-electrolyte lithium–sulfur batteries†
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2018-06-26 00:00:00 , DOI: 10.1039/c8ee01377b
Gaoran Li _{1,

2,

3,

4,

5} , Wen Lei _{6,

7,

8,

9,

10} , Dan Luo _{1,

2,

3,

4,

5} , Yaping Deng _{1,

2,

3,

4,

5} , Zhiping Deng _{6,

7,

8,

9,

10} , Deli Wang _{6,

7,

8,

9,

10} , Aiping Yu _{1,

2,

3,

4,

5} , Zhongwei Chen _{1,

2,

3,

4,

5}

Affiliation

The rational design of cathode host materials is significant in fulfilling high-efficiency sulfur electrochemistry as well as boosting the energy density of lithium–sulfur (Li–S) batteries. Herein, we develop a stringed “tube on cube” nanohybrid (CPZC) with a ternary hierarchical architecture, which contains a fibrous carbon skeleton, highly porous carbon cube filler, and abundant CNT tentacles as an advanced matrix for sulfur electrodes. The as-developed CPZC delivers excellent conductivity, abundant active interfaces, and strong confinement to polysulfide, and thus is capable of significantly expediting the sulfur redox kinetics and promoting battery durability. The fabricated sulfur electrode achieves a superb rate capability up to 10C, outstanding cyclability over 2000 cycles, and more importantly, excellent performance under high a sulfur loading and sparing electrolyte with a high energy density of 348.8 W h kg⁻¹ and 327.6 W h L⁻¹ at the system level, which reveals its potential in promoting the practical application of Li–S batteries.

中文翻译：

串接的“立方管”纳米混合体，作为紧凑型阴极基质，适用于高负荷和稀薄电解质锂硫电池†

阴极基质材料的合理设计对于实现高效的硫电化学以及提高锂硫（Li-S）电池的能量密度都具有重要意义。在本文中，我们开发了具有三元分层结构的弦状“管上立方”纳米杂交体（CPZC），其中包含纤维状碳骨架，高度多孔的碳立方填充物和丰富的CNT触角，作为硫电极的高级基质。刚开发的CPZC具有出色的导电性，丰富的活性界面以及对多硫化物的强封闭性，因此能够显着加快硫氧化还原动力学并提高电池耐久性。所制造的硫电极可实现高达10C的超高倍率能力，在2000次循环中具有出色的循环能力，更重要的是^-1和327.6 W h L^-1在系统级，这表明了其在促进Li-S电池实际应用方面的潜力。

更新日期：2018-06-26

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