In situ formed robust submicron-sized nanocrystalline aggregates enable highly-reversible potassium ion storage

Nano Energy ◽  
2021 ◽  
pp. 106233
Author(s):  
Kuan-Ting Chen ◽  
Yi-Chun Yang ◽  
Lian-Ming Lyu ◽  
Ming-Yen Lu ◽  
Hsing-Yu Tuan
Keyword(s):  
Potassium Ion ◽  
Ion Storage

Fast and stable potassium-ion storage achieved by in situ molecular self-assembling N/O dual-doped carbon network

2019 ◽  
Vol 23 ◽  
pp. 46-54 ◽  
Author(s):  
Jiafeng Ruan ◽  
Yahui Zhao ◽  
Sainan Luo ◽  
Tao Yuan ◽  
Junhe Yang ◽  
...  
Keyword(s):  
Potassium Ion ◽  
Self Assembling ◽  
Ion Storage ◽  
Carbon Network

Introducing a conductive pillar: a polyaniline intercalated layered titanate for high-rate and ultra-stable sodium and potassium ion storage

2020 ◽  
Vol 56 (60) ◽  
pp. 8392-8395 ◽  
Author(s):  
Jiaying Liao ◽  
Qiao Hu ◽  
Jinxiao Mu ◽  
Fei Chen ◽  
Xiaodong He ◽  
...  
Keyword(s):  
Potassium Ion ◽  
High Rate ◽  
Layered Titanate ◽  
Ion Storage ◽  
Sodium And Potassium

An in situ formed polyaniline pillared layered titanate with uniform TiO2 coating for sodium and potassium ion storage is proposed.

In Situ Formation of Hierarchical Bismuth Nanodots/Graphene Nanoarchitectures for Ultrahigh‐Rate and Durable Potassium‐Ion Storage

Small ◽  
2019 ◽  
Vol 16 (2) ◽  
pp. 1905789 ◽  
Author(s):  
Yuanxin Zhao ◽  
Xiaochuan Ren ◽  
Zhenjiang Xing ◽  
Daming Zhu ◽  
Weifeng Tian ◽  
...  
Keyword(s):  
Potassium Ion ◽  
Ion Storage ◽  
In Situ Formation

scholarly journals Confining TiO2 Nanotubes in PECVD-Enabled Graphene Capsules Toward Ultrafast K-Ion Storage: In Situ TEM/XRD Study and DFT Analysis

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Jingsheng Cai ◽  
Ran Cai ◽  
Zhongti Sun ◽  
Xiangguo Wang ◽  
Nan Wei ◽  
...  
Keyword(s):  
Rate Capability ◽  
Chemical Vapor ◽  
Potassium Ion ◽  
In Situ Tem ◽  
Practical Applications ◽  
Ion Storage ◽  
Wide Availability ◽  
Storage Behavior ◽  
Storage Technologies

AbstractTitanium dioxide (TiO2) has gained burgeoning attention for potassium-ion storage because of its large theoretical capacity, wide availability, and environmental benignity. Nevertheless, the inherently poor conductivity gives rise to its sluggish reaction kinetics and inferior rate capability. Here, we report the direct graphene growth over TiO2 nanotubes by virtue of chemical vapor deposition. Such conformal graphene coatings effectively enhance the conductive environment and well accommodate the volume change of TiO2 upon potassiation/depotassiation. When paired with an activated carbon cathode, the graphene-armored TiO2 nanotubes allow the potassium-ion hybrid capacitor full cells to harvest an energy/power density of 81.2 Wh kg−1/3746.6 W kg−1. We further employ in situ transmission electron microscopy and operando X-ray diffraction to probe the potassium-ion storage behavior. This work offers a viable and versatile solution to the anode design and in situ probing of potassium storage technologies that is readily promising for practical applications.

scholarly journals In Situ Monitoring the Potassium-Ion Storage Enhancement in Iron Selenide with Ether-Based Electrolyte

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Xiaodan Li ◽  
Jinliang Li ◽  
Wenchen Zhuo ◽  
Zhibin Li ◽  
Liang Ma ◽  
...  
Keyword(s):  
Solid Electrolyte Interphase ◽  
Specific Capacity ◽  
Elastic Solid ◽  
Potassium Ion ◽  
In Situ Monitoring ◽  
Iron Selenide ◽  
Ion Storage ◽  
Stable Performance ◽  
New Perspective

AbstractAs one of the promising anode materials, iron selenide has received much attention for potassium-ion batteries (KIBs). Nevertheless, volume expansion and sluggish kinetics of iron selenide result in the poor reversibility and stability during potassiation–depotassiation process. In this work, we develop iron selenide composite matching ether-based electrolyte for KIBs, which presents a reversible specific capacity of 356 mAh g−1 at 200 mA g−1 after 75 cycles. According to the measurement of mechanical properties, it is found that iron selenide composite also exhibits robust and elastic solid electrolyte interphase layer in ether-based electrolyte, contributing to the improvement in reversibility and stability for KIBs. To further investigate the electrochemical enhancement mechanism of ether-based electrolyte in KIBs, we also utilize in situ visualization technique to monitor the potassiation–depotassiation process. For comparison, iron selenide composite matching carbonate-based electrolyte presents vast morphology change during potassiation–depotassiation process. When changing to ether-based electrolyte, a few minor morphology changes can be observed. This phenomenon indicates an occurrence of homogeneous electrochemical reaction in ether-based electrolyte, which results in a stable performance for potassium-ion (K-ion) storage. We believe that our work will provide a new perspective to visually monitor the potassium-ion storage process and guide the improvement in electrode material performance.

Oxygen Defects Engineering of VO 2 · x H 2 O Nanosheets via In Situ Polypyrrole Polymerization for Efficient Aqueous Zinc Ion Storage

2021 ◽  
pp. 2103070
Author(s):  
Zhengchunyu Zhang ◽  
Baojuan Xi ◽  
Xiao Wang ◽  
Xiaojian Ma ◽  
Weihua Chen ◽  
...  
Keyword(s):  
Zinc Ion ◽  
Oxygen Defects ◽  
Ion Storage

Sulfur-doped 3D hierarchical porous carbon network toward excellent potassium-ion storage performance

Rare Metals ◽  
2021 ◽  
Author(s):  
Dan Wang ◽  
Kang-Hui Tian ◽  
Jie Wang ◽  
Zhi-Yuan Wang ◽  
Shao-Hua Luo ◽  
...  
Keyword(s):  
Porous Carbon ◽  
Potassium Ion ◽  
Hierarchical Porous Carbon ◽  
Storage Performance ◽  
Hierarchical Porous ◽  
Ion Storage ◽  
Carbon Network
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