With the increased demand from the storage of renewable energy sources,some safe and inexpensive energy storage technologies instead of Li-ion batteries become urgently needed.Therefore,K-ion batteries(KIBs)have attra...With the increased demand from the storage of renewable energy sources,some safe and inexpensive energy storage technologies instead of Li-ion batteries become urgently needed.Therefore,K-ion batteries(KIBs)have attracted much attention and evolved significant development because of the low price,safety,and similar property compared with Li-ion batteries.Due to the high reversibility,stability,and low potential plateau,graphite becomes a current research focus and is regarded as one of the most promising KIB’s anode materials.In this review,we mainly discuss the electrochemical reaction mechanism of graphite during potassiation-depotassiation process and analyze the effects of electrode/electrolyte interface on graphite for Kion storage.Besides,we summarize several kinds of methods to improve the performance of graphite for KIBs,including the design of graphite structure,selection of appropriate binder,solvent chemistry,and salt chemistry.Meanwhile,a concept of“relative energy density”is raised,which can be more accurate to evaluate the genuine electrochemical performance of graphite anode involving the specific capacity and potential.In addition,we also summarize the considerable challenges to current graphite anode in KIBs and we believe our work will offer alterative solutions to further explore high-performance graphite anode of K-ion storage.展开更多
The incidence rate of pancreatic tuberculosis(PT)is low,and it is difficult to distinguish from pancreatic malignant tumor before operation.We present 3 patients diagnosed after surgical treatment.All 3 cases involved...The incidence rate of pancreatic tuberculosis(PT)is low,and it is difficult to distinguish from pancreatic malignant tumor before operation.We present 3 patients diagnosed after surgical treatment.All 3 cases involved female patients who were admitted due to primary manifestation of abdominal pain.These patients did not exhibit symptoms such as jaundice or back pain,and their tumor markers were within normal range.The surgical interventions employed included partial resection of the tumor in 1 case,mass resection in another,and pancreaticoduodenectomy in the third.Preoperative puncture biopsy is essential for diagnosing PT,and it should be actively conducted on patients with suspected cases.We summarize several common manifestations of PT to find the possibility of tuberculosis during preoperative evaluation and avoid misdiagnosis and unnecessary surgery.展开更多
基金supports from the National Natural Science Foundation of China(51772135,52002115)the Fundamental Research Funds for the Central Universities(21617330)Science and Technology Development Project of Henan Province(212102210487)。
文摘With the increased demand from the storage of renewable energy sources,some safe and inexpensive energy storage technologies instead of Li-ion batteries become urgently needed.Therefore,K-ion batteries(KIBs)have attracted much attention and evolved significant development because of the low price,safety,and similar property compared with Li-ion batteries.Due to the high reversibility,stability,and low potential plateau,graphite becomes a current research focus and is regarded as one of the most promising KIB’s anode materials.In this review,we mainly discuss the electrochemical reaction mechanism of graphite during potassiation-depotassiation process and analyze the effects of electrode/electrolyte interface on graphite for Kion storage.Besides,we summarize several kinds of methods to improve the performance of graphite for KIBs,including the design of graphite structure,selection of appropriate binder,solvent chemistry,and salt chemistry.Meanwhile,a concept of“relative energy density”is raised,which can be more accurate to evaluate the genuine electrochemical performance of graphite anode involving the specific capacity and potential.In addition,we also summarize the considerable challenges to current graphite anode in KIBs and we believe our work will offer alterative solutions to further explore high-performance graphite anode of K-ion storage.
文摘The incidence rate of pancreatic tuberculosis(PT)is low,and it is difficult to distinguish from pancreatic malignant tumor before operation.We present 3 patients diagnosed after surgical treatment.All 3 cases involved female patients who were admitted due to primary manifestation of abdominal pain.These patients did not exhibit symptoms such as jaundice or back pain,and their tumor markers were within normal range.The surgical interventions employed included partial resection of the tumor in 1 case,mass resection in another,and pancreaticoduodenectomy in the third.Preoperative puncture biopsy is essential for diagnosing PT,and it should be actively conducted on patients with suspected cases.We summarize several common manifestations of PT to find the possibility of tuberculosis during preoperative evaluation and avoid misdiagnosis and unnecessary surgery.
