Li+ mobility powered by a crystal compound for fast Li-S chemistry

Ben Chen; Boxin Li; Jingxuan Bi; Hongfang Du; Siying Wang; Lei Liu; Linghai Xie; Jinmeng Sun; Zhuzhu Du; Wei Ai

doi:10.1039/d3cc03535b

Li⁺ mobility powered by a crystal compound for fast Li-S chemistry

Ben Chen, Boxin Li, Jingxuan Bi, Hongfang Du, Siying Wang, Lei Liu, Linghai Xie, Jinmeng Sun, Zhuzhu Du, Wei Ai

Institute of Flexible Electronics

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

Placing blocking layers between electrodes has shown paramount prospects in suppressing the shuttle effect of Li-S batteries, but the associated ionic transport would be a concurrent obstacle. Herein, we present a Li-based crystal composited with carbon (LiPN₂@C) by a one-step annealing of Li⁺ absorbed melamine polyphosphate, which simultaneously achieves alleviated polysulfide-shuttling and facilitated Li⁺ transport. As a homologous crystal, LiPN₂ with abundant lithiophilic sites makes Li⁺ transport more efficient and sustainable. With a LiPN₂@C-modified separator, the Li₂S cathode exhibits a much-lower activation potential of 2.4 V and a high-rate capacity of 519 mA h g⁻¹ at 2C. Impressively, the battery delivers a capacity of 726 mA h g⁻¹ at 0.5C with a low decay rate of 0.25% per cycle during 100 continuous cycles.

Original language	English
Pages (from-to)	12140-12143
Number of pages	4
Journal	Chemical Communications
Volume	59
Issue number	81
DOIs	https://doi.org/10.1039/d3cc03535b
State	Published - 14 Sep 2023

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title = "Li+ mobility powered by a crystal compound for fast Li-S chemistry",

abstract = "Placing blocking layers between electrodes has shown paramount prospects in suppressing the shuttle effect of Li-S batteries, but the associated ionic transport would be a concurrent obstacle. Herein, we present a Li-based crystal composited with carbon (LiPN2@C) by a one-step annealing of Li+ absorbed melamine polyphosphate, which simultaneously achieves alleviated polysulfide-shuttling and facilitated Li+ transport. As a homologous crystal, LiPN2 with abundant lithiophilic sites makes Li+ transport more efficient and sustainable. With a LiPN2@C-modified separator, the Li2S cathode exhibits a much-lower activation potential of 2.4 V and a high-rate capacity of 519 mA h g−1 at 2C. Impressively, the battery delivers a capacity of 726 mA h g−1 at 0.5C with a low decay rate of 0.25% per cycle during 100 continuous cycles.",

author = "Ben Chen and Boxin Li and Jingxuan Bi and Hongfang Du and Siying Wang and Lei Liu and Linghai Xie and Jinmeng Sun and Zhuzhu Du and Wei Ai",

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doi = "10.1039/d3cc03535b",

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T1 - Li+ mobility powered by a crystal compound for fast Li-S chemistry

AU - Chen, Ben

AU - Li, Boxin

AU - Bi, Jingxuan

AU - Du, Hongfang

AU - Wang, Siying

AU - Liu, Lei

AU - Xie, Linghai

AU - Sun, Jinmeng

AU - Du, Zhuzhu

AU - Ai, Wei

PY - 2023/9/14

Y1 - 2023/9/14

N2 - Placing blocking layers between electrodes has shown paramount prospects in suppressing the shuttle effect of Li-S batteries, but the associated ionic transport would be a concurrent obstacle. Herein, we present a Li-based crystal composited with carbon (LiPN2@C) by a one-step annealing of Li+ absorbed melamine polyphosphate, which simultaneously achieves alleviated polysulfide-shuttling and facilitated Li+ transport. As a homologous crystal, LiPN2 with abundant lithiophilic sites makes Li+ transport more efficient and sustainable. With a LiPN2@C-modified separator, the Li2S cathode exhibits a much-lower activation potential of 2.4 V and a high-rate capacity of 519 mA h g−1 at 2C. Impressively, the battery delivers a capacity of 726 mA h g−1 at 0.5C with a low decay rate of 0.25% per cycle during 100 continuous cycles.

AB - Placing blocking layers between electrodes has shown paramount prospects in suppressing the shuttle effect of Li-S batteries, but the associated ionic transport would be a concurrent obstacle. Herein, we present a Li-based crystal composited with carbon (LiPN2@C) by a one-step annealing of Li+ absorbed melamine polyphosphate, which simultaneously achieves alleviated polysulfide-shuttling and facilitated Li+ transport. As a homologous crystal, LiPN2 with abundant lithiophilic sites makes Li+ transport more efficient and sustainable. With a LiPN2@C-modified separator, the Li2S cathode exhibits a much-lower activation potential of 2.4 V and a high-rate capacity of 519 mA h g−1 at 2C. Impressively, the battery delivers a capacity of 726 mA h g−1 at 0.5C with a low decay rate of 0.25% per cycle during 100 continuous cycles.

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U2 - 10.1039/d3cc03535b

DO - 10.1039/d3cc03535b

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SN - 1359-7345

VL - 59

SP - 12140

EP - 12143

JO - Chemical Communications

JF - Chemical Communications

IS - 81

ER -

Li⁺ mobility powered by a crystal compound for fast Li-S chemistry

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