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首页> 外文期刊>Chemistry: A European journal >One-Pot Method for Synthesizing Spherical-Like Metal Sulfide–Reduced Graphene Oxide Composite Powders with Superior Electrochemical Properties for Lithium-Ion Batteries
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One-Pot Method for Synthesizing Spherical-Like Metal Sulfide–Reduced Graphene Oxide Composite Powders with Superior Electrochemical Properties for Lithium-Ion Batteries

机译：一锅法合成具有优异电化学性能的球形离子金属硫化物还原氧化石墨烯复合粉，用于锂离子电池

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摘要

A facile, one-pot method for synthesizing spherical- like metal sulfide–reduced graphene oxide (RGO) composite powders by spray pyrolysis is reported. The direct sulfidation of ZnO nanocrystals decorated on spherical-like RGO powders resulted in ZnS–RGO composite powders. ZnS nanocrystals with a size below 20 nm were uniformly dispersed on spherical-like RGO balls. The discharge capacities of the ZnS–RGO, ZnO–RGO, bare ZnS, and bare ZnO powders at a current density of 1000 mAg~(-1) after 300 cycles were 628, 476, 230, and 168 mAhg~(-1), respectively, and the corresponding capacity retentions measured after the first cycles were 93, 70, 40, and 21 %, respectively. The discharge capacity of the ZnS–RGO composite powders at a high current density of 4000 mAg~(-1) after 700 cycles was 437 mAhg~(-1). The structural stability of the highly conductive ZnS–RGO composite powders with ultrafine crystals during cycling resulted in excellent electrochemical properties.
机译：报道了一种通过喷雾热解法合成球形金属硫化物还原氧化石墨烯（RGO）复合粉末的简便，一锅法。在球形RGO粉末上装饰的ZnO纳米晶体的直接硫化导致ZnS–RGO复合粉末。尺寸小于20 nm的ZnS纳米晶体均匀分散在球形RGO球上。经过300次循环后，电流密度为1000 mAg〜（-1）时ZnS–RGO，ZnO–RGO，ZnS和ZnO粉末的放电容量分别为628、476、230和168 mAhg〜（-1）。在第一个循环后测得的相应容量保持率分别为93％，70％，40％和21％。 ZnS–RGO复合粉末在700次循环后的4000 mAg〜（-1）的高电流密度下的放电容量为437 mAhg〜（-1）。具有超细晶体的高导电性ZnS–RGO复合粉末的结构稳定性在循环过程中具有出色的电化学性能。

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